Preparing The Power-Frequency Voltage Test; Instructing The Operating Personnel - Siemens 8DJH Installation And Operating Instructions Manual

Installation
Test operation and
mechanical function test
Electrical function test
Preparations
80/121
ATTENTION
Circuit-breaker type L2: To operate the circuit-breaker type 2 for test without auxiliary voltage,
the undervoltage release (option) must be blocked. On circuit-breakers type 2, the
undervoltage release is delivered by the factory in "Trip blocked" setting (position A), and will
not function.
➭ Perform test operation with the circuit-breaker type 2.
➭ After test operation, activate the undervoltage release; screw the retaining bolt in at
position B.
Always perform test operation and mechanical function test without high voltage.
➭ On circuit-breakers and switch-fuse combinations, do not perform any no-load switching
operations, i.e. opening commands without closing before.
➭ Switch all switching devices several times manually to all switching positions (see page 83,
"Operation") and check the position indicators.
➭ Check mechanical interlocks (see page 14, "Interlocks") with normal force. Verify smooth
operation of control gates.
➭ Check the fuse tripping functionality with a test fuse.
➭ Fit HV HRC fuse-links, see page 109, "Replacing HV HRC fuse-links".
➭ Check service readiness, see page 85, "Ready-for-service indicator". The pointer of the ready-
for-service indicator must be in the green area.
➭ Only circuit-breaker type L2: Insert the retaining bolt at the undervoltage release (option)
in position B.
➭ Switch all three-position disconnectors or three-position switch-disconnectors to OPEN
position.
➭ Switch on auxiliary voltage and check polarity.
➭ Switch switching devices with electrical operation to all switching positions (electrically and
manually). Check position indicators and electrical interlocking conditions.
➭ Only circuit-breaker type L2: While charging the spring energy store and in ready-to-close
state, auxiliary voltage must be applied without interruption at the undervoltage release
(option).
➭ Check electrical indications and trippings.
15.3

Preparing the power-frequency voltage test

A power-frequency voltage test can be performed at the readily installed switchgear.
➭ Remove voltage transformers.
➭ Remove surge arresters and surge limiters.
➭ Protect bushings of voltage transformers, surge arresters and surge limiters in a surge-proof
way using suitable sealing caps.
➭ Short-circuit the current transformers at the secondary terminals.
➭ Earth the capacitive test sockets.
✔ The power-frequency voltage test can now be performed.
15.4

Instructing the operating personnel

➭ Instruct operating personnel in theory and practice of switchgear operation.
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9