Test Operation And Mechanical Function Test; Electrical Function Test; Changing The Setting Of The Undervoltage Release - Siemens 8DJH Installation And Operating Instructions Manual

8 | Commissioning

8.3 Test operation and mechanical function test

8.4 Electrical function test

8.4.1 Changing the setting of the undervoltage release

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▪ Warning signs
▪ Indicators for the capacitive voltage detecting system with HR plug-in sockets or LRM plug-in
sockets (optional)
▪ Keys for low-voltage compartment (optional)
☒ Operating voltage is not switched on.
☒ Only circuit-breaker type 1.1: Auxiliary voltage is switched on.
1. On circuit-breakers and switch-fuse combinations, do not perform any no-load switching
operations, i.e. opening commands without closing before.
2. Switch all switching devices several times manually to all switching positions ( [▶ Page 133,
"Operation"]) and check the position indicators.
3. Check mechanical interlocks ( [▶ Page 14, "Interlocks"]) with normal force. Verify smooth
operation of locking device.
4. Check the fuse tripping functionality with a test fuse.
5. Fit HV HRC fuse-links [▶ Page 160, "Replacing HV HRC fuse-links"].
6. Check service readiness [▶ Page 135, "Ready-for-service indicator"]. The pointer of the ready-
for-service indicator must be in the green area.
7. Only circuit-breaker type 2: Set undervoltage release to "reset" position [▶ Page 130,
"Changing the setting of the undervoltage release"].
▪ On circuit-breakers type 2, the undervoltage release is delivered by the factory in
position A "Trip blocked".
▪ On circuit-breakers type 1.1, the undervoltage release is delivered by the factory in
position B "Trip reset".
☒ Only circuit-breaker type 2: While charging the spring energy store and in ready-to-close
state, auxiliary voltage must be applied without interruption at the undervoltage release
(option).
☒ Only circuit-breaker type 2: Undervoltage release is in "reset" position [▶ Page 130,
"Changing the setting of the undervoltage release"].
1. Switch all three-position disconnectors or three-position switch-disconnectors to OPEN
position.
2. Switch on auxiliary voltage and check polarity.
3. Switch switching devices with electrical operation to all switching positions (electrically and
manually). Check position indicators and electrical interlocking conditions.
4. Check electrical indications and trippings.
The operating mechanisms for the circuit-breakers can be optionally equipped with an
undervoltage release. The undervoltage release is located in the operating mechanism
compartment behind the front cover.
A retaining bolt is screwed in at the undervoltage release. By changing the position of the
retaining bolt, the function of the undervoltage release can be blocked.
A
Auslöser blockiert
B
Auslöser frei
Fig. 171: Undervoltage release
8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
INFORMATION
Retaining bolt
1
Trip blocked
Trip reset