·Robust hardware
·Protection functions
·Rich measuring inputs
·Communication
·User-machine interface(UMI)
·Logs and Records
The AM5SE relay has the modular design and it can be optimized to almost all type of feeder protection applications in medium voltage distribution systems.



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Analogue inputs |
AM5SE |
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-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Input current |
8 |
8 |
8 |
8 |
9 |
9 |
9 |
8 |
6 |
8 |
8 |
8 |
8 |
0 |
/ |
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Input voltage |
6 |
4 |
4 |
4 |
4 |
4 |
4 |
4 |
8 |
6 |
6 |
6 |
6 |
8 |
/ |
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Digital |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
|
Digital Input |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
20 |
12 |
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Digital Output |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
10 |
64 |
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Rear port |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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RS485 (2 ports) |
√ |
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Ethernet(2 ports) |
■ |
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USB(1 port) |
√ |
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Protocols |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Modbus Serial |
√ |
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Modbus over Ethernet |
■ |
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IEC 60870-5-103 |
√ |
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TCP IEC 60870-5-103 |
■ |
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IEC 60870-5-101 |
√ |
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Measurement |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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4-20mA analog output |
■ |
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Electric parameter |
U、I、P、Q、PF、Fr、Ep、Eq、Es |
U、I |
U、Fr |
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Logs and Records |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Fault recorder |
√ |
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Number of circuit breaker trip and close |
√ |
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Sequence of event record |
√ |
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Monitoring function |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Trip-and-Close Circuit Supervision |
√ |
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Remote control |
√ |
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Others |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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GPS |
√ |
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Protection Function |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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3 stages directional overcurrent (with voltage dependant)[ANSI 67] |
√ |
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√ |
√ |
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√ |
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3 stages overcurrent (with composite voltage blocking)[ANSI 50/51] |
√ |
√ |
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√ |
√ |
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√ |
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Differential protection with ratio restraining[ANSI 87] |
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√ |
√ |
√ |
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Instantaneous Differential protection[ANSI 87] |
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√ |
√ |
√ |
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Motor overcurrent(motor start,motor run,2 stages) |
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√ |
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√ |
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Overcurrent (2 stages) [ANSI 50/51] |
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√ |
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Overcurrent IDMT [ANSI 51N] |
√ |
√ |
√ |
√ |
√ |
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√ |
√ |
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√ |
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Bus charge |
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√ |
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Protection Function |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Bus tie protection and standby power automatic switch |
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√ |
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2 stages Directional earth fault [ANSI 67N] |
√ |
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√ |
√ |
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√ |
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2 stages earth fault [ANSI 50N/51N] |
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√ |
√ |
√ |
√ |
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√ |
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Earth fault IDMT[ANSI 50N/51N] |
√ |
√ |
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√ |
√ |
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Clearance earth fault protection(2 stages) |
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√ |
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Negative sequence overcurrent (2 stages)[ANSI 46] |
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√ |
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√ |
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Negative sequence overcurrent IDMT[ANSI 46] |
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√ |
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√ |
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Overload [ANSI 49F] |
√ |
√ |
√ |
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√ |
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√ |
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Starting air-cooled water chiller |
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√ |
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On-load tap charge lock-out |
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√ |
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Undervoltage (trip)[ANSI 27] |
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√ |
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√ |
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√ |
√ |
√ |
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Undervoltage (alarm)[ANSI 27] |
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√ |
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√ |
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√ |
√ |
√ |
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√ |
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Capacitor undervoltage(trip) |
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√ |
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Loss of voltage (trip) |
√ |
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√ |
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Loss of voltage (alarm) |
√ |
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√ |
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Overvoltage protection[ANSI 59] |
√ |
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√ |
√ |
√ |
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√ |
√ |
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√ |
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Residual voltage protection(trip)[ANSI 59N] |
√ |
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√ |
√ |
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√ |
√ |
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√ |
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Residual voltage protection(alarm)[ANSI 59N] |
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√ |
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√ |
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√ |
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PT supervision[ANSI 60] |
√ |
√ |
√ |
√ |
√ |
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√ |
√ |
√ |
√ |
√ |
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√ |
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Unbalance voltage[ANSI 60] |
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√ |
√ |
√ |
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Unbalance current[ANSI 60] |
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√ |
√ |
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Motor starting time-out[ANSI 48] |
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√ |
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√ |
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CT supervision[ANSI 60] |
√ |
√ |
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√ |
√ |
√ |
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√ |
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Three phase Auto-reclose[ANSI 79] |
√ |
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Thermal overload protection[ANSI 49M] |
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√ |
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√ |
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Locked rotor[ANSI 51LR] |
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√ |
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√ |
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FC block[ANSI 86] |
√ |
√ |
√ |
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√ |
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√ |
√ |
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Post-accelerated overcurrent |
√ |
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√ |
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Under frequency[ANSI 81U] |
√ |
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√ |
√ |
√ |
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Over frequency[ANSI 81O] |
√ |
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√ |
√ |
√ |
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Incorrect phase sequence |
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√ |
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√ |
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Voltage Phase loss protection |
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√ |
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√ |
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Directional power protection[ANSI 32] |
√ |
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√ |
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Power recovery protection |
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√ |
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Under power protection |
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√ |
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Non-electricity |
√ |
√ |
√ |
√ |
√ |
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√ |
√ |
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√ |
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PT supervision and parallel connection |
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√ |
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Synchro-check[ANSI 25] |
√ |
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√ |
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√ |
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Rate of change of frequency[ANSI 81R] |
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√ |
√ |
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Trip-and-Close Circuit Supervision(alarm) |
√ |
√ |
√ |
√ |
√ |
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√ |
√ |
√ |
√ |
√ |
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Protection Function |
-F |
-T |
-M |
-C |
-MD |
-D2 |
-D3 |
-TB |
-IS |
-FE |
-FA |
-B |
-K |
-UB |
-FD |
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Auto-close with voltage recovery |
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√ |
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PT harmonic elimination |
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√ |
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Overhaul-lockout[ANSI 86] |
√ |
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Rated Characteristics
|
Characteristics Version |
AM5SE-F,AM5SE-T,AM5SE-M,AM5SE-C, AM5SE-B,AM5SE-D2,AM5SE-D3, AM5SE-TB,AM5SE-MD |
AM5SE-UB, AM5SE-IS, AM5SE-FE, AM5SE-FA,AM5SE-K |
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Power Supply |
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Rated voltage |
AC/DC 110V or AC/DC 220V |
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Range |
Rated voltage × (1±20%) |
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Burden |
≤15 VA |
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PT Inputs |
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Rated value |
AC 100V or V |
AC 380V or 220V |
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PT rated secondary range |
0.1V~120V |
0.1V ~ 456V |
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Accuracy |
0.5S |
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Burden |
≤0.5VA (each phase) |
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Voltage withstand |
Continuous: 1.2 Un 10s: 2 Un |
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Phase CT Inputs (Protection Current) |
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CT rated secondary range |
AC 5A or 1A |
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Dynamic |
20 × CT rated current |
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Accuracy |
0.5S |
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Burden |
≤0.5VA (each phase) |
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Thermal withstand |
Continuous: 2 In 1s: 40 In |
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Phase CT Inputs (Measurement Current) |
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CT rated secondary range |
AC 5A or 1A |
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Dynamic |
1.5 × CT rated current |
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Accuracy |
0.5S |
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Burden |
≤0.5VA (each phase) |
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Thermal withstand |
Continuous: 1.5 In 1s: 4 In |
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Frequency |
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50Hz or 60Hz |
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40 ~ 70Hz |
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±0.1Hz |
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Digital Inputs |
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AC/DC 110V or AC/DC 220V |
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70% of nominal voltage |
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55% of nominal voltage |
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≤ 1W (each phase) (DC220V) |
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Digital Outputs |
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≥ 10000 operations |
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≥ 1000W, L / R = 40ms |
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≥ 5A |
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≥ 30A for 200ms |
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≥ 30W, L/R = 40ms |
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Protection characteristics
|
Characteristics |
Accuracy |
Resolution |
Disengaging ratio |
|
Voltage |
±3% |
0.001V |
0.95 and 1.05 |
|
Current |
±3% |
0.001A |
0.95 and 1.05 |
|
Frequency |
±0.02Hz |
0.001Hz |
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Operation delay|t>(DT) |
40ms or ±2% setting value |
0.001s |
- |
|
Operation delay|t>(IDMT) |
40ms or ±5% setting value |
0.001s |
- |

X1 1-16 Current
X1 17-28 Voltage
X2 1-8 RS-485 and IRIG-B
X4 1-2 Power supply
X4 3 Power ground
X5 1-24 Digital inputs
X6 1-20 Digital outputs
X6 21-38 Anti-pumping and trip and close supervision
X7 1-3 Analog output
ETH 1-2 Ethernet
XU USB
2PT &2CT Wiring



1.Prepare the cut-out in the panel for the flush installation according to the above dimensions.
2.Fasten the AM5SE protection relay in its position with for four M3×12mm screws with washers.
3.Cover four small flip covers on the four screws again.
