Device
Number |
|
Description |
|
Specific Relay Type |
|
Contained within
Multifunction Relay Type
|
| 2 |
Time
Delay |
|
Contained
within most relays |
| 3 |
Checking
or interlocking Relay |
|
Motorvision
2, MVD, Microvision |
| 9 |
Reversing
Device |
|
Motorvision
2, MVD, Microvision |
| 21 |
Distance |
|
|
| 25 |
Synchronism
check
|
MSP-CS
|
AFV
2 |
| 26 |
Apparatus Thermal
Device |
|
Motorvision 2, MVD,
Microvision |
| 27 |
Undervoltage |
MSP-UV |
MSP-V, MRI - V, Microvision
& Supervision Series Relays |
| 30 |
Annunciator |
MRAU, MRAW |
MR, Microvision &
Supervision Series Relays |
| 32 |
Directional Power |
MRRP - 1 / 3 |
|
| 37 |
Undercurrent or underpower |
|
MPR Relays, Microvision
& Supervision Series Relays |
| 38 |
Bearing Protective
Device |
|
Motorvision 2, MVD,
Microvision |
| 40 |
Field Failure |
MRFF |
|
| 44 |
Unit Sequence Starting
Relay |
|
Motorvision 2, MVD,
Microvision |
| 46 |
Reverse Phase |
MRNS |
MPR Relays, Microvision
& Supervision Series Relays |
| 47 |
Phase-sequence Voltage |
MPR2000 |
Motorvision 2 |
| 49 |
Thermal |
|
MPR Relays, Microvision
& Supervision Series Relays |
| 50 |
Instantaneous overcurrent |
MRI |
Relays, Microvision
& Supervision Series Relays |
| 50 g/n |
Definite Time Ground
OC |
MRI |
Motorvision 2, Feedervision
2, Microvision |
| 51 g/n |
Inverse Definite
Minimum Time Ground OC |
MRI |
Feedervision 2 |
| 51 |
AC Time Overcurrent |
MRI - I |
MRI Relays, Microvision
& Supervision Series Relays |
| 55 |
Power Factor Relay |
|
Motorvision 2 |
| 59 |
Overvoltage |
MSP - OV |
MSP-V, Microvision
& Supervision Series Relays |
| 60 |
Voltage Balance Relay |
MRVB |
|
| 63 |
Pressure |
|
|
| 64 |
Apparatus ground |
MSP-REF |
Motorvision 2, Feedervision
2, Microvision |
| 66 |
Starts per hour/time
between starts |
|
Motorvision 2, MVD,
Microvision |
| 67 |
AC Directional Overcurrent |
MRI-ID |
|
| 68 |
Blocking |
|
Feedervision 2
|
| 69 |
Permissive |
|
Feedervision
2 |
| 74 |
Alarm |
|
Relays |
| 76 |
DC Overcurrent |
|
|
| 78 |
Out-of-step |
MROS |
MRMF |
| 79 |
AC Reclosing |
MRAR |
|
| 81 |
Frequency |
MRFF |
MRMF, Motorvision
2, Feedervision 2 |
| 85 |
Carrier or pilot-wire |
|
|
| 86 |
Lock Out |
MRTS |
MRI Relays, Microvision
& Supervision Series Relays |
| 87 |
Differential |
MRDT, MIRD-T2 |
|
| 94 |
Tripping |
MRAU |
All Relays |
| |
|
|
|
|
|
|
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