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QUEENSLAND URBAN UTILITIES
QUU CONTRACT NO: C112-022
LUGGAGE POINT STP/LUGGAGE POINT
OPERATION & MAINTENANCE MANUAL
Chp3Operation.doc
DRAFT: A 23-Jul-13
Page 3 of 10
The shock relay has an adjustable shock current. This adjustment allows the user to tailor the trip
current to exact application needs. Once the load is started and running under normal conditions
(the start delay is timed out), the shock relay will detect any current reading higher than the shock
current setting, and it will trip. The shock current should be set at just slightly more current than
normal motor running current.
To eliminate nuisance tripping, the shock relay has a shock delay time setting. This setting is the
period of time excessive current is allowed to occur before the relay trips. This time should be set
as short as possible. This setting should be zero unless nuisance tripping occurs. Do not exceed to
0.2 second, maximum.
Field Setup Procedure for the Tsubaki Shock Relay
Follow these general rules before setting up the Tsubaki shock relay:
Rule #1 — The shock relays must be set.
Rule #2 — Each relay must be set individually to its motor.
Rule #3 — When a motor is replaced, its shock relay must be reset.
Rule #4 — If you don’t understand or the shock relay does not work after setup, call
ANDRITZ
immediately.
Figure 3-1. Parts of the Tsubaki Shock Relay
Luggage Point STP ST18 Pre Treatment (Aqua-Screen (Andritz) Operation and Maintenance Manual) General
Q-Pulse Id: TMS579
Active: 13/12/2013
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