IEEE C37.2
(Standard Electrical
Power System Device
Function Numbers and
Contact Designations)
Continued…
46 – Reverse-phase or phase-balance current relay
48 – Incomplete sequence relay
50 – Instantaneous overcurrent relay
51 – AC time overcurrent relay
52 – AC circuit breaker
55 – Power factor relay (USING INTERNAL PLC EDITOR)
59AC – AC overvoltage relay
59DC – DC overvoltage relay
62 – Time delay stopping or opening relay
71 – Level switch
74 – Alarm relay
78 – Phase-angle measuring relay
79 – Reclosing relay (USING INTERNAL PLC EDITOR)
81 – Frequency relay
83 – Automatic selective control or transfer relay
86 – Lockout relay
In line with our policy of continual development, Deep Sea Electronics, reserve the right to change
specification without notice.
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