6RX Series Trip Circuit Supervision Relays
6RX11 Trip Relay Circuit Supervision
- Low burden
- Contacts picked up for healthy trip coil condition
- Slug time delay
- Hand reset flag indicator
- 2 C/O contacts standard
- Draw out case
- Equivalent function to MVAX11
- 1TM13 specification
The operating element for the 6R MATRIX supervision relay functional elements are designated 6RX & are based on our 6R eries relays.
The 6RX11 relay is designed to supervise trip relay circuits utilizing high burden trip relays such as the 6RJ & 2HSM series vailable from RMS.
The operating element of the 6RX11 comprises a single 6R heavy-duty attracted armature control relay with a single operating coil & delay slug. It has two dropping resistors R1 & R2 of equal ohmic value, connected in series with the coil.
If the circuit being supervised becomes open circuited or if the supply fails, the relay will become reenergized and an alarm or visual indication will be given.
Under healthy conditions the relay coil is energized via the dropping resistor R1 as shown below (Tripping relay circuit). If the circuit being supervised becomes open circuit or if the supply fails, the relay will become de-energized & an alarm is given 2 C/O contacts & flag indication).
To prevent the alarm being given when the circuit being supervised is operated the relay coil is maintained via the dropping resistor R2. For this purpose, an additional normally open contact is required from the latching tripping relay as depicted at right. A short time delay (>100ms), is incorporated to hold up the alarm relay during a normal trip relay operation.
Contacts are constructed from silver, shaped & positioned to ensure reliable, low resistance operation. Over travel of the contacts during each operation causes a wiping action ensuring a clean “make”.