This document provides information on equipment bushings types 750S1, 775S1, and 775T1. The bushings are used in equipment insulated with oil, like transformers and switchgear, with voltages up to 36 kV and currents of 800A and 1250A. Each bushing is tested for AC withstand and partial discharge before leaving the factory. The bolted bushings meet specifications of standard IEC 60137. To order, specify the bushing type, voltage, and current rating.

1. 8
05/2015
Up to 36 kV
800 A & 1250 A
750S1, 775S1 & 775T1
INTERFACE E - 5/8"
EQUIPMENT BUSHING
Application
For use in equipment insulated
with oil fluid, typically for
transformers, switchgear,
capacitors...
Design
The equipment bushing is a
moulded epoxy insulated part in
accordance with ANSI/IEEE 386
std. (5/8" threading system).
Technical characteristics
Each bushing is tested for
AC withstand and partial
discharge prior to leaving
the factory.
Specifications and
standards
The bolted type equipment
bushings 750S1, 775S1 and
775T1 meet the requirements
of IEC 60137.
Ordering instructions
To order the equipment
bushing, specify the type.
In mm, except where noted.
6/10 (12) kV
6.35/11 (12) kV
8.7/15 (17.5) kV
12/20 (24) kV
12.7/22 (24) kV
18/30 (36) kV
Equipment
bushing
type
Voltage
Ur
(kV)
Current
Ir
(A)
Dimensions (mm)
A B
750S1
775S1
775T1
36
36
36
800
1250
1250
75
75
221
235
235
378
1.5
A
B
32
stainless
steel flange
Dia. 76
Dia. 114
Minimum
oil level:
75 mm
5/8”-11UNC-2A
5/8”-11UNC-2B
Dia.
32
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.cablejoints.co.uk
www.thorneanderrick.co.uk

2. 9
750S1, 775S1 and 775T1
bushings
fixing flange
type : MK 600-1
(antimagnetic)
fixing studs and
nuts M10
sealing gasket
bushing interface
equipment
connection
equipment
140
170
60°
60°
10
In mm.
FIXINGS FOR
EQUIPMENT BUSHINGS
Bushing fixing flange
To order the bushing fixing
flange, simply specify MK600-1.
Tel: +44 (0)191 490 1547
Fax: +44 (0)191 477 5371
Email: northernsales@thorneandderrick.co.uk
Website: www.cablejoints.co.uk
www.thorneanderrick.co.uk