Power & Communications; Bushing Adaptors - GE Kelman DGA 900 Plus Installation & Commissioning Manual

9.3 Power & Communications
If possible, pre-install the power supply and communications cable connections from the
intended product location to their sources. See Section 9.1 for the general installation
layout.
A suitable circuit meeting the technical specification requirements must be
available for the product at the time of installation. Installation must be
done in accordance with local wiring regulations.
An external circuit breaker must be installed on the AC / DC source near to
the product and within easy reach of the operator. It should be clearly
labelled as the disconnecting device for the product.
Fuses and circuit breakers must be installed in accordance with the local
and/or national wiring regulations.
Only use cables rated at 75 °C minimum for the installation.
ALL cables entering the cabinet should have at least 150 mm (6 in.) of
excess length to allow for cable strain relief.
The outer sheath of the mains supply cable should continue into the
equipment as far as possible so that reinforced insulation is maintained
between the operator and mains supply.
The mains supply should be connected so that the protective earth wire
should be the last wire to take the strain and break free in the event of the
cord being pulled out of the cabinet. Tighten the cable gland to secure the
cable.
9.4

Bushing Adaptors

Bushing Adaptors are supplied pre-assembled. An overview to the installation process is
as follows:
▪
A pre-installation check is performed.
▪
A Bushing Adaptor circuit integrity test is performed.
▪
Conductive grease is applied to thread (threaded Bushing Adaptor only).
▪
The whole Bushing Adaptor is screwed into the bushing tapping point.
▪
The top cover of the Bushing Adaptor is removed leaving the body in place as
illustrated in Figure 9-5.
▪
The cabling is attached through the top cover and O-ring.
▪
The top cover of the Bushing Adaptor is re-attached as illustrated in Figure 9-6.
MA-041 – DGA 900 Plus - Installation & Commissioning Manual - Rev 1.1 4-Mar-22 Page 36 of 99