Type B Vital Relays - Alstom

Installation
Table 3–5. AC Microchron II Timer Relay Installation Procedure
Step
Procedure
1 Check that the relay cover and seal are not damaged.
2 Verify that the relay prong surfaces are clean and not bent.
While the prongs of the relay that engage with the terminals in the plugboards
are clean and adjusted when they leave the factory, there is always the chance
that they may become dirty or bent in handling.
• If prongs are dirty, clean by burnishing.
• If prongs are bent, bend them back into position so they make contact when
the relay is installed.
3 Review the operating characteristics of the relay and verify the appropriate relay
is being installed before proceeding.
Relay 50800-103-01 50800-104-01
Input Voltage Range
Input Power While Timing
Input Power After Timing
with Relay Energized
88 to 135 Vrms, 60 Hz
AC
11 mA rms at 88 Vrms
18 mA rms at 110 Vrms
44 mA rms at 135 Vrms
26 mA rms at 88 Vrms
27 mA rms at 110 Vrms
45 mA rms at 135 Vrms
WARNING
44 to 66 Vrms, 25 Hz AC
23 mA rms at 44 Vrms
54 mA rms at 55 Vrms
161 mA rms at 66 Vrms
52 mA rms at 44 Vrms
61 mA rms at 55 Vrms
148 mA rms at 66 Vrms
THE AC MICROCHRON II TIMER RELAY MAY NOT BE
INTERCHANGEABLE WITH A MOTOR-OPERATED TIMER IN
EVERY CIRCUIT APPLICATION BECAUSE OF THE
FOLLOWING DIFFERENCE BETWEEN THE TWO TIMERS:
• AC MICROCHRON II TIMER RELAY - CHECK CIRCUIT
OPENS AFTER TIME DELAY HAS EXPIRED, AND CLOSES
WHEN POWER IS REMOVED
• AC MOTOR TIMER - CHECK CIRCUIT OPENS AT
BEGINNING OF TIME DELAY AND CLOSES WHEN POWER
IS REMOVED
4 For a new installation, check plugboard to ensure proper connections; refer to
ED50800-103-01 for the 60 Hz relay or ED50800-104-01 for the 25 Hz relay.
P1457, Rev. Nov/07 3–13 Alstom Signaling Inc.