VAMP Ltd
Overcurrent and earth-fault relay
Technical Description
VAMP 130
VM130.EN003
Vamp 24h support phone : +358 (0)40 573 6316
1
Table of Content
1. Introduction ............................................................................3
1.1. Application ..........................................................................3
1.2. Main features.......................................................................3
2. Functions .................................................................................5
2.1. Principles of the numerical protection technique .........5
2.2. Relay protection functions ................................................7
2.2.1. Overcurrent protection I>, I>>, I>>> (50/51)..........7
2.2.2. Non-directional earth-fault protection (50/51N) 13
2.2.3. Phase unbalance protection I
2
> (46) .................. 14
2.2.4. Second harmonic stage / inrush (68) .................. 15
2.2.5. Thermal overload protection T> (49F) ................. 16
2.2.6. Circuit-breaker failure protection CBFP (50BF) .. 19
2.3. Measurement functions of the relay............................. 20
2.4. Output relay and blocking functions............................ 20
2.4.1. Output relay matrix ................................................ 21
2.4.2. Blocking matrix ........................................................ 21
2.5. Communication ............................................................... 21
2.6. Disturbance recorder ...................................................... 21
2.7. Self-supervision.................................................................. 23
3. Application examples .........................................................24
3.1. Overcurrent, earth-fault and phase discontinuity
protection of an overhead line feeder ....................... 24
3.2. Overcurrent and earth-fault protection of a
distribution transformer feeder ...................................... 25
3.3. Power transformer HV side overcurrent and earth-fault
protection......................................................................... 26
3.4. Circuit-breaker failure protection via the output relay
T2 ........................................................................................ 27
3.5. Three-phase overcurrent protection with two current
transformers...................................................................... 28
3.6. Trip circuit supervision ...................................................... 29
4. Connections .........................................................................32
4.1. Digital input ....................................................................... 32
4.2. Auxiliary voltage............................................................... 33
4.3. Output relays .................................................................... 33
4.4. Serial communication connection ............................... 33
4.5. Block diagram .................................................................. 34
4.6. Connection diagram ...................................................... 35
5. Technical data .....................................................................36
5.1. Connections ..................................................................... 36
5.1.1. Measuring circuitry ................................................. 36
5.1.2. Auxiliary voltage ..................................................... 36
5.1.3. Digital input.............................................................. 36
5.1.4. Trip contacts (T1 and T2)........................................ 37
5.1.5. Alarm contacts (A1...A3) and IF ........................... 37
