Hitachi APCQ - APCQ-M and APCQ-R Capacitor Banks; Electrical Installation; Dielectric Test; Electrical Connections Overview

APCQ CAPACITOR BANKS
STATUS
Approved
SECURITY LEVEL
Public
DOCUMENT ID
9AKK107680A4136
RE V.
E
LANG.
en
PAGE
17/47
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5 mm
Figure 16: Anchor fixture details
– Minimum clearance at top and bottom of the APCQ-L unit is 200 mm
– Can be placed immediately side by side with other cubicles
5.3.2. APCQ-M and APCQ-R capacitor banks
– Free floor standing cubicles - minimum clearance distance at the back: 50 mm,
– Can be placed immediately side by side with other cubicles,
– Lateral panels can be removed in the only case where the cabinets are mechanically assembled together with the
mechanical interconnection kit (optional).
5.4. Electrical installation
5.4.1. Dielectric test
All APCQ capacitor banks are fully factory tested including a dielectric test between power terminals and earth (2500V
50Hz 10s).
If additional dielectric test is required on site, the following procedure should be followed:
– Short-circuit the three busbars,
– Apply between earth and short-circuited busbars 2000V 50Hz 10s.
Any damage resulting of this test should be notified immediately to your local HITACHI ENERGY representative.
Remove short circuit after the test.
5.4.2. Electrical connections overview
Each APCQ capacitor bank cubicle requires individual:
– Earth connection (M8 screws  required torque = 25 NM),
– Power connection (M12 screws  required torque = 86 NM),
– Current transformer (CT) connection (spring cage connections).