MCGG MANUAL RELAY.pdf

Type MCGG 22, 42, 52, 53, 62, 63 & 82Overcurrent Relay for Phase and Earth Faults Type MCGG 22, 42, 52, 53, 62, 63 & 82 Overcurrent Relay for Phase and Earth Faults Figure 1: Relay type MCGG 62 withdrawn from case. Features • Accurately follows time curves to BS142 and IEC60255. • Choice of 4 inverse time curves and 3 definite time ranges by • High resetting ratio. switched selection. • Fast resetting time. • Wide setting range of 0.05 x In • Positive, calibrated settings by to 2.4 x In in steps of 0.05 x In. means of switches. • Time multiplier range 0.05 to 1 • Internal dc auxiliary power on all seven characteristics. supply operating over a wide • Separate LED indicators provided input range. on each measuring board to • Separate test mode with trip test show time delayed and feature. instantaneous operations. • Indication of power to the • LED start indicators provided to measuring board. facilitate testing. • Non-volatile memory for time • Separate output contacts delayed and instantaneous LED provided for time delayed phase indicators. fault, instantaneous phase fault, time delayed earth fault and instantaneous earth fault operations. • Low ac burden. • Suitable for use with separate direction relay. 2 required to limit this voltage. is performed via an analogue-to-digital converter. the output contacts and the dc An instantaneous element with low supply are broken. when the module is systems. the CT circuits are short configuration can be readily circuited before the connections to accommodated. a standard relay can be applications a non-linear resistor is the current transformer connections ordered before detailed co. whether not required. by means of safety contacts within ordination studies are carried out – Non-standard resistance values and the case terminal block. performed on a single phase or polyphase input. Other applications include the other circuits of the relay. 3 phase 2 phase Single phase Measuring Case Model overcurrent overcurrent or earthfault boards size † inst † inst † inst MCGG 22 ● ● 1 4 MCGG 42 ● ● 2 6 MCGG 52 ● ● ● ● 3 8 MCGG 53 ● ● ● ● 2 8 MCGG 62 ● ● 3 6 MCGG 63 ● ● 1 6 MCGG 82 ● ● ● ● 4 8 Application For applications where the Description instantaneous earth fault element is The relay can be used in required to have a sensitive setting This range of MCGG relays is applications where time graded whilst remaining stable on heavy designed so that versions are overcurrent and earth fault through faults the use of a stabilising available with separate measuring protection is required. instantaneous element. MCGG 63 MCGG 52 Three phase overcurrent (with Two phase overcurrent plus earth polyphase measurement). with fault with instantaneous elements. This can be easily computer as a basic circuit element. Associated publications: MCGG 62 MCGG 42 Midos System R6001 Three phase overcurrent with Two phase overcurrent with Directional Relay R6003 instantaneous elements. The current boards for each phase or earth fault transformers for this application input. changes in system are available. instantaneous element. 3 . alternatively. removed.Models available MCGG 53 MCGG 82 Two phase overcurrent (with Three phase overcurrent plus earth MCGG 22 polyphase measurement) plus earth fault with instantaneous elements. resistor is recommended. The relay uses transient overreach is incorporated solid state techniques. The total impedance of the relay contained in a single plug-in module generators and HV feeder circuits and the series stabilising resistor is which is supplied in a size 4. together with feeders. Application diagrams are provided in Figures 2 to 8 (inclusive) showing typical wiring configurations. phase inputs The relay can be used to provide must satisfy the criteria detailed may be combined on to one board selective protection for overhead under ‘Current transformer for polyphase measurement (see and underground distribution requirements’ in Technical Data. Single phase overcurrent with fault with instantaneous elements. each within each phase or earth fault measuring board utilising a micro- measuring board. Removal of the characteristics available on one internal faults. Also. instantaneous elements. but in some module automatically short circuits relay. 6 or 8 and the protection of neutral usually low enough to prevent the Midos case. disabled in applications where it is The current measurement. current transformers developing one or two terminal blocks for With all the current/time voltages over 2kV during maximum external connections. table). These boards. are back-up protection for transformers. For added a distinct advantage for complex non-linear voltage limiting devices security. The case incorporates earthing resistors. 2 to 4.05s steps characteristics 4 0. ● Definite time 8 seconds D8 ● Table1: Operating time characteristics with corresponding switch positions. During this test.14 ● Standard inverse sec SI service. to select the required time/current characteristic.2s steps selection is carried out by means of three switches (identified by symbol on the nameplate).4 to 8.0 in 0. characteristics s s Selection of time 2 0.0 in 0.025. These are used definite time characteristics.5 available to carry out a trip test on ● Very inverse sec VI ● (I – 1) the output relays. This control is marked xt = Σ where Σ is the sum of all the switch positions. ● 80 ● Extremely inverse t= sec EI When required. capable ● of circuit breaker tripping.0x in steps of 0. ● ● Definite time 2 seconds D2 Separate output contacts. Relay settings This acts as a conventional time multiplier on the current dependent Separate setting switches for each characteristics and gives the measuring board are provided on following time ranges for the the relay frontplate. are ● provided for time delayed phase ● Definite time 4 seconds D4 faults. ● Trip test ● Power to each measuring board ● may be tested whilst the relay is in t= 0.0 in 0.1 to 2.Each measuring board has a built-in Switch position Operating ‘power off’ memory feature for the (0) (1) characteristic time delayed and instantaneous LED ● indicators.1s steps The current/time characteristic 8 0.05x to 1.02 – 1) measurement. without affecting the current ● (I0. instantaneous phase faults. Table 1 gives the basic operating characteristic and the settings of the switches. ● time delayed earth fault and ● instantaneous earth fault operations. Time multiplier setting The time given by each of the operating characteristics must be multiplied by the time multiplier to give the actual operating time of the relay. current and time Operating Time range multiplier settings. directional control ● (I2 – 1) can be exercised over the relay by ● connecting an output contact from 120 ● Long time earth fault t = sec LT direction relay type METI to the ● (I – 1) terminals provided. The range of multiplication is from 0. 4 . current measurement is inhibited. A test mode is also ● t= 13. of the directional relays should be connected as shown. When all switches are set to the left (at zero). Module terminal block viewed from rear 4.05 x In. normal the switch positions and Is is the current measurement is not time delayed element setting.05 x In to 2. instantaneous element is marked The LEDs are reset on releasing the Iinst = Σ x Is where Σ is the sum of push button. When directional control is required the contacts 27 28 before (b) and (c) disconnect. The range of adjustment of finite settings is from 1x to 31x in unity steps. both relay rated current in amps. the instantaneous feature is rendered inoperable. A P2 P1 A S2 S1 B C B C Phase rotation Directional control PhA Indicator 24 TMS Inst Curve reset setting setting selection (See Note 4) 23 (See Note 2) 27 Time delayed trip µC IA Is Inst. the Instantaneous element reset button is pressed. Earthing connections (CTs) are typical only. output relays associated with that measuring board will operate. Single phase with instantaneous element. whilst the relay is in service. or when the lowest switch is set to infinity regardless of the Figure 2: Type MCGG 22 nameplate positions of the other five switches. indicating that there The setting control of the is power to the measuring boards. (c) Long terminals 3.Current setting Trip test Current measurement is inhibited by Time delayed element setting the curve selection switches The current setting control is marked to 111. This causes all three LEDs to Is = Σ x In where Is is the current flash once per second. inhibited. If. trip PhA RL1–1 7 28 6 Input Current Phase fault circuit setting I>Is 5 time delayed Ph Ph RL1–2 2 trip output RL1 contacts Case earth 2 1 13 1 2 +VE Power Output Vx 14 supply circuits RL2–1 8 –VE Ph 5 6 26 circuits 10 7 8 RL2 9 Phase fault 2 instantaneous 9 10 trip output RL2–2 16 Case earth connection contacts 13 14 (See Note 3) 15 15 16 MCGG 22 23 24 Notes: 26 1. all the LEDs are illuminated. 5 . Figure 3: Application diagram (10 MCGG 22 02): static modular overcurent relay type MCGG 22. If the reset setting in amps. Each measuring board provides a setting range of 0. (b) Short terminals break before (c). Contacts must close to inhibit overcurrent relay.4 x Power supply healthy test In in steps of 0. During this test. Σ is the sum of all push button is then pressed for the switch positions and In is the approximately six seconds. (a) CT shorting links make 2. CT connections are typical only. Figure 4: Application diagram (10 MCGG 42 03): static modular overcurent relay type MCGG 42. 4. CT connections are typical only. of the directional relays should be connected as shown. trip Is PhA Output 33 22 circuits Phase fault Input Current Ph 34 time delayed 23 circuit setting I >I s RL2 trip output RL1–2 29 Ph Ph 2 contacts Directional control 24 30 PhC TMS Inst Curve 45 setting setting selection RL2–1 36 46 37 25 Time delayed trip 38 Phase fault µC instantaneous IC Is PhC Inst. (c) Long terminals Figure 5: Application diagram (10 MCGG 52 03): static modular overcurent relay type MCGG 52. CT connections are typical only. viewed from rear (with integral case earth strap) (b) Short terminals break before (c). trip Output RL1–1 35 22 circuits Ph 33 23 Input Current Phase fault circuit setting I> Is 34 RL2 time delayed Ph Ph RL1–2 29 trip output 2 24 contacts Directional 30 control PhC TMS Inst Curve 45 setting setting selection RL2–1 36 46 37 Case earth Time Phase fault 25 delayed trip 38 µC instantaneous 1 2 29 30 IC Inst. Earthing connections are typical only. Contacts must close to inhibit overcurrent relay. Earthing connections are typical only. (b) Short terminals break before (c). Contacts must close to inhibit overcurrent relay. 6 . (a) CT shorting links make 2. P2 P1 A S2 S1 Directional Indicator A control B reset PhA TMS Inst Curve C 49 setting setting selection 50 RL1 C B (See Note 2) 21 Time delayed trip 2 (See Note 4) RL1–1 35 Phase rotation µC IA Inst. trip Output Is circuits 13 14 41 42 28 RL4–1 8 15 16 43 44 Input Current 13 circuit setting I >I s RL4 10 17 18 45 46 +VE Power 2 Earth fault Vx 14 9 19 20 47 48 –VE supply instantaneous 21 22 49 50 17 circuits RL4–2 16 trip output contacts 23 24 15 25 26 Case earth connection MCGG 52 (See Note 3) 27 28 Notes: 1. Two phase with instantaneous element. A P2 P1 A S2 S1 B Directional Indicator TMS Inst Curve reset control setting setting selection C PhA 49 C B Phase rotation (See Note 4) 50 RL1 (See Note 2) 21 Time delayed trip 2 µC IA Is PhA Inst. trip RL2–2 41 trip output Is PhC contacts 3 4 26 5 6 33 34 42 27 Input Current 7 8 35 36 circuit setting I> Is 9 10 37 38 Ph Ph 11 12 28 13 13 14 41 42 +VE Power 15 16 Vx –VE 14 supply 17 18 45 46 1 circuits 19 20 47 48 MCGG 42 21 22 49 50 Case earth connection (See Note 3) 23 24 Notes: 25 26 1. trip RL2–2 42 trip output 26 contacts Input Current 41 circuit setting I >I s Case earth Ph Ph Directional RL3–1 7 1 2 29 30 control 6 3 4 E/F TMS Inst Curve Earth fault 43 5 5 6 33 34 setting setting selection time delayed 44 RL3 RL3–2 2 trip output 7 8 35 36 27 2 contacts 9 10 37 38 Time delayed trip µC 1 11 12 E/F Inst. Two phase plus earth fault with instantaneous elements. viewed from rear (with integral case earth strap) 4. of the directional relays should be connected as shown. When directional control is required the contacts 27 28 before (b) and (c) disconnect. Module terminal block before (b) and (c) disconnect. Module terminal block (c) Long terminals 3. When directional control is required the contacts 3. (a) CT shorting links make 2. P2 P1 A S2 S1 Directional Indicator A control B reset PhA TMS Inst Curve C 49 setting setting selection 50 C B (See Note 4) (See Note 2) 21 Time delayed trip µC RL1–1 35 Phase rotation IA Inst. trip Output Is circuits 13 14 41 42 28 RL4–1 8 15 16 43 44 13 Input Current I >I s RL4 +VE Power circuit setting 10 17 18 45 46 Vx 14 2 Earth fault 19 20 47 48 –VE supply 9 17 instantaneous circuits RL4–2 16 trip output 21 22 49 50 contacts 23 24 Case earth connection 15 25 26 (See Note 3) MCGG 53 27 28 Notes: 1. (b) Short terminals break before (c). viewed from rear (with integral case earth strap) (c) Long terminals Figure 7: Application diagram (10 MCGG 62 03): static modular overcurent relay type MCGG 62. Module terminal block viewed from rear (b) Short terminals break before (c). 4. of the directional relays should be connected as shown. Module terminal block 4. Two phase (with polyphase measurement). P2 P1 A S2 S1 Directional Indicator A control B reset PhA TMS Inst Curve C 49 setting setting selection 50 RL1 C B (See Note 2) 21 Time delayed trip 2 (See Note 4) RL1–1 35 Phase rotation µC IA Inst. Contacts must close to inhibit overcurrent relay. of the directional relays should be connected as shown. 7 . When directional control is required the contacts 3. CT connections are typical only. trip Is Ph Output 33 22 circuits Phase fault Ph 34 time delayed 23 Current I >I s RL2 setting RL1–2 29 trip output Ph 2 contacts Directional 24 30 control PhC RL2–1 36 45 46 37 38 Phase fault 25 instantaneous IC RL2–2 41 trip output contacts 26 42 Case earth Input circuit Directional Ph RL3–1 7 1 2 29 30 control 6 3 4 E/F TMS Inst Curve Earth fault 43 5 setting setting selection time delayed 5 6 33 34 44 RL3 RL3–2 2 trip output 7 8 35 36 27 2 contacts 9 10 37 38 Time delayed trip µC 1 11 12 E/F Inst. When directional control is required the contacts 3. trip 2 RL2–2 41 trip output 24 contacts Input Current I>Is 27 42 circuit setting Case earth Directional Ph Ph control 28 1 29 30 PhC 45 TMS Inst Curve setting setting selection 33 34 46 35 36 25 Time delayed trip 37 38 µC IC Is PhC Inst. Earthing connections are typical only. (a) CT shorting links make 2. trip Is PhA 33 22 Phase fault Input Current RL1 34 time delayed circuit setting I>Is trip output 2 RL1–2 29 Ph Ph contacts Directional control 30 PhB Output 47 TMS Inst Curve circuits setting setting selection Ph RL2–1 36 48 37 23 Time delayed trip RL2 38 Phase fault µC instantaneous IB Is PhB Inst. Three phase with instantaneous element. trip 26 13 14 41 42 Input Current 13 circuit setting I>Is +VE Power Ph Ph 45 46 Vx 14 –VE supply 47 48 1 circuits 21 22 49 50 23 24 Case earth connection 25 26 (See Note 3) MCGG 62 Notes: 27 28 1. Earthing connections are typical only. (a) CT shorting links make 2. CT connections are typical only. plus earth fault with instantaneous elements. Contacts must close to inhibit overcurrent relay. (with integral case earth strap (c) Long terminals Figure 6: Application diagram (10 MCGG 53 02): static modular overcurent relay type MCGG 53. before (b) and (c) disconnect. before (b) and (c) disconnect. 4. trip Is PhB Phase fault 7 8 38 35 36 24 instantaneous 9 10 37 38 Input circuit Current setting RL2–2 41 trip output Ph Ph I>Is contacts 11 12 Directional 13 14 41 42 control 42 phase PhC 15 16 43 44 45 TMS Inst Curve setting setting selection RL3–1 7 17 18 45 46 46 6 19 20 47 48 25 Time delayed trip Earth fault 21 22 49 50 µC 5 time delayed IC Inst. 17 circuits 2. trip Is PhC RL3–2 2 trip output 23 24 26 Input circuit Current setting contacts 25 26 Ph Ph I>Is 1 27 28 Directional control E/F RL4–1 8 43 TMS Inst Curve RL3 Module terminal block setting setting selection 10 44 2 viewed from rear Earth fault (with integral case earth strap) 9 27 Time delayed trip Output instantaneous µC circuits RL4–2 16 trip output Inst. CT connections are typical only. trip Is E/F E/F contacts Notes: 28 RL4 Input circuit Current setting 15 1. Case earth connection Contacts must close to inhibit overcurrent relay. When directional control is required the contacts (See Note 3) of the directional relays should be connected as shown. A P2 P1 A Directional S2 S1 control Indicator B reset PhA C 49 TMS Inst Curve setting setting selection C B N 50 RL1 Phase rotation (See Note 2) 21 2 Time delayed trip (See Note 4) µC RL1–1 35 IA Inst. supply –VE (c) Long terminals. 4. 8 . +VE Power MCGG 82 Vx 14 (b) Short terminals break before (c). Contacts must close to inhibit overcurrent relay. (a) CT shorting links make 2. trip Is PhA Output 33 22 circuits Input circuit Current setting Ph Phase fault I>Is 34 time delayed Ph Ph RL2 Directional trip output control 2 RL1–2 29 contacts PhB Case earth 47 TMS Inst Curve 30 setting setting selection 48 1 2 29 30 RL2–1 36 3 4 23 Time delayed trip µC 37 5 6 33 34 IB Inst. (with integral case earth strap) (c) Long terminals Figure 8: Application diagram (10 MCGG 63 02): static modular overcurent relay type MCGG 63. before (b) and (c) disconnect. P2 P1 A S2 S1 Directional Indicator A control B reset PhA TMS Inst Curve C 49 setting setting selection 50 RL1 C B (See Note 2) 21 Time delayed trip 2 (See Note 4) RL1–1 35 Phase rotation µC IA Inst. Earthing connections are typical only. Figure 9: Application diagram (10 MCGG 82 03): static modular overcurent relay type MCGG 82. Three phase plus earth fault with instantaneous elements (4 wire system). Three phase (with polyphase measurement) with instantaneous element. CT connections are typical only. (a) CT shorting links make 13 E/F E/F I>Is 2 before (b) and (c) disconnect. When directional control is required the contacts 3. trip Is Ph Output 33 22 circuits Phase fault Ph 34 time delayed Directional Current I> Is RL2 setting RL1–2 trip output control 29 contacts PhB Ph 2 47 30 48 23 RL2–1 36 IB 37 38 Phase fault 24 instantaneous Directional RL2–2 41 trip output control contacts PhC 42 45 Case earth 46 1 2 29 30 25 3 4 IC 5 6 33 34 26 7 8 35 36 Input 27 9 10 37 38 circuit 11 12 13 14 41 42 28 15 16 13 +VE Power 17 18 45 46 Vx 14 –VE supply 19 20 47 48 1 circuits 21 22 49 50 23 24 Case earth connection 25 26 (See Note 3) MCGG 63 27 28 Notes: 1. Module terminal block viewed from rear (b) Short terminals break before (c). Earthing connections are typical only. of the directional relays should be connected as shown. 3. 9 .0W 3. the CT rating can be increased in steps of 2.0W 3. 53 52.15 Note: For 5A applications with longer leads.5W 110/250 2.0W 4. 48/125V or 110/250V Burdens AC Burden Less than 0.5W per element. With output elements operated they are increased by up to 2.5W 3.02Ω for 5A relays and is independent of current. please consult the Applications Department of ALSTOM T&D Protection & Control Ltd.5W 4. the use of a stabilising resistor is recommended. The impedance of the relays over the whole of the setting range (5% to 240% rated current) is less than 0. 63 42. 62 82 24/54 1.5 10P 20 0.06Ω lead resistance.5VA for 5A relays.5W 2.5 10P 20 1 5 7. DC burden Relay Relay type rating MCGG MCGG MCGG MCGG 22.0W The figures above are maxima under quiescent conditions.25Ω for 1A relays and less than 0.0W 5. If assistance is required in selecting the appropriate value.5W 4.Technical Data Ratings AC current (In) 1A or 5A Frequency 50/60Hz DC supply (Vx) 24/54V.5VA where each step of 2. at unity power factor and at rated current on any setting. Current transformer requirements Relay and CT Nominal Accuracy Accuracy Limiting lead secondary rating output class limit current resistance – (A) (VA) (X rated current) one way (ohms) 1 2.0W 48/125 2. the value of which will vary according to the specific application. Instantaneous earth fault element For installations where the earth fault element is required to have a sensitive setting whilst remaining stable on heavy through faults.5W 3.5VA is equivalent to additional 0.25 VA for 1A relays and less than 0. 4In for MCGG 22. 62.05 to 1. 4s.05In to 2.025 steps (applicable to all time characteristics) Instantaneous elements Shown in Figure 11 For settings of 5 x Is and above: <35ms at 2x instantaneous setting Accuracy – reference conditions Current setting (Is) Reference range 0. phase/ earth fault measuring range: 5% to 240% of In in 5% steps.0 in 0. Instantaneous setting (Iinst) 1 x –31 x Is in 1 x 1s steps Operating time Time delayed element Shown in Figure 10 Operating characteristics selectable to give: Standard inverse IDMT Very inverse IDMT Extremely inverse IDMT Long time earth fault IDMT Definite time 2s.Setting ranges Time delayed settings (Is). 52. 42. 82 and E/F element of MCGG53.2In to 2.3 x Is to 31 x Is Ambient temperature 20°C Frequency 50Hz to 60Hz Time multiplier setting 1x DC auxiliary voltage Reference ranges 24V to 54V 48V to 125V 110V to 250V 10 .4In for phase fault elements of MCGG 53 and 63. 8s Time multiplier setting 0. Input current Time Reference characteristic range Standard inverse Very inverse 2 x Is to 31 x Is Long time inverse Extremely inverse 2 x Is to 20 x Is Definite time 1. 0. 02 I –1 1.5 t= I–1 Figure 10: Time delayed overcurrent element – Extremely inverse operation time characteristics.14 t = 0.0 Very inverse 13. 11 .1 1 10 100 I( x Is) Current (multiple of setting) 240 220 200 180 160 140 Operating time (ms) 120 100 Iinst = 1Is 80 60 2Is 3Is 40 5-31Is 4Is 20 0 1 10 100 Current (multiple of instantaneous setting) Figure 11: MCGG instantaneous operating times (various settings). t= 2 80 I –1 0. 100 10 Definite 8 seconds Operating time t (seconds) Definite 4 seconds Longtime standby earth fault 120 Definite 2 seconds t= I–1 Standard inverse 0. Overshoot time Less than 30ms (when the input current is reduced from any value within the operative range to zero). DC auxiliary voltage Vx dc(V) Operative range (V) 24/54 19 – 60 48/125 37.05 to 1.Accuracy – influencing quantities Time multiplier On settings 0.1 x Iinst All other settings Iinst ±5% Operating time Time characteristic Accuracy Standard inverse Very inverse ±5% Long time inverse Extremely inverse ±7.0 x Iinst to 1. 12 .5% Definite time ±3% Frequency Setting current ±1% over the range 47 – 62Hz Operating time ±2% or ±30ms whichever is the greater.5 – 300 Variations over these ranges Setting current ±1% Operating time ±2% or ±30ms whichever is greater Accuracy – general Current setting Time delayed element 1.0 ±2% or ±30ms whichever is the greater Ambient temperature operative range –25°C to +55°C Variations over this range Setting current ±5% Time characteristic Time variation Standard inverse Very inverse ±5% Long time inverse Extremely inverse ±7.1 x Is Instantaneous elements Iinst = 1 x Is 1.0 x Is to 1. over the range 47–52Hz or 57–62Hz.5% ±30ms whichever is greater Definite time ±3% Repeatability (within basic accuracy claim) Pick-up current Better than ±1% Operating time Better than ±2% or ±30ms whichever is greater.5 – 150 110/250 87. Transient overreach System time constant up to 30ms: 5% (instantaneous elements) System time constant up to 100ms: 12% Thermal withstand Continuous withstand 2 x Is or 2. 53. 42.6 x In whichever is lower. 82 Phase fault time delayed element 1 1 Phase fault instantaneous element 1 1 Earth fault time delayed element 1 1 Earth fault instantaneous element 1 1 MCGG 22. Contacts Changeover Make MCGG 52. The green timer start indicator illuminates when the input current exceeds the setting current Is to facilitate testing of the module.Resetting current Time delayed and instantaneous elements: not less than 95% of time delayed current setting. LED covers are available to eliminate any undesired LED indication. one showing time delayed operation and the other showing instantaneus operation. 63 Time delayed element 1 1 Instantaneous element 1 1 13 . with a minimum of 1 x In Short time withstand For 1s: 100 x In with 400A maximum For 3s: 57 x In with 230A maximum Operation indicators Each measuring board is fitted with two red LED indicators. The reset button provided on the frontplate resets all the operation indicators. This indicator is self resetting. 62. Resetting and disengaging times Less than 70ms (when the input current is reduced from any value within the operative range to zero). 000 operations minimum Unloaded contact 100. 53 43 to 46. 1kV rms for 1 minute across open contacts of output relays. (see note). with terminals on each independent circuit connected together.000 operations minimum Directional control Directional control can be exercised over each pole individually by connecting the output contact of a relay type METI across appropriate case terminals. with the exception of the directional control terminals. 49. High voltage withstand Dielectric withstand IEC 60255-5: 1977 2kV rms for 1 minute between all case terminals connected together and the case earth terminal.2s 7500VA subject to maxima of 30A and 300V ac or dc Carry continuously 5A ac or dc Break ac – 1250VA subject to dc – 50W resistive maxima of 25W. L/R = 0. 2kV rms for 1 minute between terminals of independent circuits. with the exception of the directional control terminals. be insulation or impulse tested to the case. High voltage impulse IEC 60255-5: 1977 Three positive and three negative impulses of 5kV peak.04s 5A and 300V Durability Loaded contact 10.24 MCGG 42 45. 50 MCGG 62. 49.Contact ratings Make and carry for 0.5J between all terminals and case earth and between adjacent terminals. 50 MCGG 52. therefore. 46. 1. Relay type Direction control terminals MCGG 22 23. 14 . These circuits must not. 0.2/50µs. 63 45 to 50 MCGG 82 43 to 50 Note: The directional control circuits are isolated from all other circuits but are electrically connected to the relay case. Note: The directional control terminals comply with class II and will withstand 1kV peak between all independent circuits.5kHz applied directly to auxiliary supply.5kHz applied directly to all inputs. 2.2/50µs between all groups and case earth. EN 61010-1: 1993/A2: 1995 Compliance is demonstrated by EN 60950: 1992/A11: 1997 reference to generic safety standards. Surge immunity IEC 61000-4-5: 1995 Level 4 4kV peak. 1. under normal operating conditions. DC supply interruption IEC 60255-11: 1979 The unit will withstand a 10ms interruption in the auxiliary supply. 1kV peak across terminals of the same circuit.2/50µs between terminals of each group. AC ripple on dc supply IEC 60255-11: 1979 The unit will witstand 12% ac ripple on the dc supply.Electrical environment High frequency disturbance IEC 60255-22-1: 1988 Class III 2. Product safety 73/23/EEC Compliance with the European Commission Low Voltage Directive. without de-energising. 1.5kV peak between independent circuits and case earth. 2. Fast transient disturbance IEC 60255-22-4: 1992 Class IV 4kV. 4kV. EMC compliance 89/336/EEC Compliance with the European Commission Directive on EMC is claimed via the Technical Construction File route. 2kV peak. Electrostatic discharge IEC 60255-22-2: 1996 Class II 4kV discharge in air with cover in place 4kV contact discharge with cover removed. EN50081-2: 1994 Generic Standards were used to EN50082-2: 1995 establish conformity. 15 . and 500V peak across the directional control terminals. Atmospheric environment Temperature IEC 60255-6: 1988 Storage and transit –25°C to +70°C Operating –25°C to +55°C IEC 60068-2-1: 1990 Cold IEC 60068-2-2: 1974 Dry heat Humidity IEC 60068-2-3: 1969 56 days at 93% RH and 40°C Enclosure protection IEC 60529: 1989 IP50 (dust protected) Mechanical environment Vibration IEC 60255-21-1: 1988 Response Class 1 Endurance Class 1 16 . 99 The dimensions of the cases are Panel cut-out: Flush mounting fixing details. 168 159 Push button 151 projection 10 max. 177 157 max. 103 11 Flush mounting. 32 212 25 min. 155 Flush mounting. Figure 12: Case outline size 4. 17 .5 All dimensions in mm. 177 157 max.4 23. 11 Figure 13: Case outline size 6.Cases 52 MCGG 22 Size 4 97 4 holes Ø4. Panel cut-out: Flush mounting fixing details. 13 and 14.4 23. MCGG 63 Size 6 168 159 MCGG 52 Size 8 MCGG 53 Size 8 Push button MCGG 82 Size 8 projection 10 max.5 MCGG 42 Size 6 MCGG 62 Size 6 All dimensions in mm. 32 212 25 min. 103.6 149 4 holes Ø4. shown in Figures 12. DC auxiliary voltage range. Requirement for LED cover part GJ0280 001.4 200 4 holes Ø4. 18 . Information Required with Order Relay type (see models available). Figure 14: Case outline size 8. All dimensions in mm. (These self adhesive LED covers can be supplied to cover the instantaneous LED when used in auto-reclose applications as the LEDs remain on during normal use). 155.4 24 168 159 Push button 203 projection 10 max. Rated current and frequency. 32 212 25 min. Panel cut-out: Flush mounting fixing details. 206 11 Flush mounting. 177 157 max. 19 . Accordingly the design of our products may change at any time. Its contents do not constitute an offer for sale or advice on the application of any product referred to in [email protected]. ALSTOM T&D Protection & Control Ltd St Leonards Works. Publication R6054X 089920 CPS Printed in England.alstom. Stafford.com ©1999 ALSTOM T&D Protection & Control Ltd Our policy is one of continuous development. this brochure should only be regarded as a guide and is intended for information purposes only.com Internet: www. . ST17 4LX England Tel: 44 (0) 1785 223251 Fax: 44 (0) 1785 212232 Email: pcs. ALSTOM T&D Protection & Control Ltd cannot be held responsible for any reliance on any decisions taken on its contents without specific advice. Whilst every effort is made to produce up to date literature.