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Instruction Leaflet
30-471 (E)
Page 8
Both under and overfrequency cards are factory calibrated at 60 Hz.
The actual values of pickup and dropout are as follows:
Type Dial Setting Pickup Dropout
Hz Hz Hz
Underfrequency 60 57 55
Underfrequency 50 47 45
Overfrequency 60 63 65
Overfrequency 50 53 55
Undervoltage / Underfrequency Module
S#1288C58G01 Option# 5A, 26F
Monitors one phase of power source.
Time Delay Modules
1-60 sec. timer S#1275C74G01 Option#1A, 3A, 4A
0.1-10 min. timer S#1275C74G02 Option#1B, 3B, 4B
0.2-30 min. timer S#1275C74G03 Option#1C, 3C, 4C
5 min fixed S#1275C74G08 Option#4D
All can be used to accomplish TDEC, and TDNE functions.
Relay Driver
S#1266C77G02 Option#1A, 1B, 1C, 3A, 3B, 3C, 4A, 4B, 4C, 4D
This card is used in place of any of the timing modules when
instantaneous operation is required.
Blank
S#1266C77G01
Used to cover any unused card slots.
All Cards Mechanically Interlocked
All cards are interlocked mechanically to prevent insertion into the
wrong function slot. All cards have a repeat accuracy over a 20 to
+60
°
C temperature change of (+ or -) 3%. Dial settings are (+ or -) 10%
of indication.
After making adjustments, tighten locking screw to secure setting.
Tighten mounting screws (screws are not captive).