Handheld Test Device; View; Preparations - Siemens UL 1066 Operating Instructions Manual

9.5

Handheld test device

The handheld test device is used to check that the trip unit, the energy and current transformers, the F5 tripping solenoid and the measured
value display are functioning properly.
9.5.1

View

(1) LED for operating voltage indication
(2) Control buttons
(3) 6 LEDs to show test results
9.5.2

Preparations

- Open and isolate the circuit breaker
- Document the trip unit setting values of the overload release
- Setting value I = 1.0 I
R
- Interrupt external voltage supply for the electronic system, if present
- Remove the cap from test socket X25 of the trip unit
Circuit breaker may trip.
If the trip settings are changed while the breaker is closed (and under load) the breaker may trip.
Adjust parameters only when the circuit breaker is in the open position.
s
Test Device for WL Electronic Trip Units
(3)
CURRENT TRANSFORMER TEST
L1 L2 L3 N
= O.K.
TRIP TEST
Input 110 ... 125 VAC, 50/60 Hz
Cat. No. WLTS, Rev. 0.0
n
G
ETU POWER
START
STATUS
S
I
N
G
3WL9111-1AT31-0AA0
NOTICE
(1)
(2)
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