Bespoke Single Phase Transformers, Single Coil

Bespoke Single Phase Transformers, Single Coil

Description

Single phase transformers constructed on ‘EI’ (single coil) laminations with concentric windings on the coil former(s). Commonly wound over the whole former with a safety earth screen between the windings, alternatively it could be on a split bobbin format without screen. Autotransformers follow a similar construction but have a single winding with no safety earth screen.
  • Temperature Rise :- Dependent on size
  • Terminals :- Clamp or Stud, Touchproof. Flying leads on request
  • Insulation Class :- B as standard for single coil construction. Higher available on request

 

Power Capability : Generally up to 7.0kVA
Voltages : Standard up to 690V. Up to 6.6kV available
Insulation Class : B as standard. Higher on request
Ambient Temp. : Max 40°C as standard. Others on request
Temperature Rise : 75-80ºC as standard. Others on request
Terminals : Clamp or Stud, touchproof. Flying leads on request

 

 

 

 

 

Options for open style

  • Fuses
  • Thermal protection
  • Tropical varnish

Transformers can be supplied in a range of enclosures from IP22 to IP65.
Options for enclosed style

  • Fuses
  • Thermal protection
  • MCBs & RCDs
  • Plugs & sockets
  • Isolators
  • Meters

The following table indicates typical sizes of ‘Open Style’ transformers for various power ratings of low voltage units (<700V). Please note these may vary slightly as the specific voltage requirements determine the final transformer design.

For ‘Enclosed Style’ transformers click the box link for a dimensional drawing
Note the inclusion of some optional components may result in a size increase of the indicated enclosure type


 

Rating
A
(mm)
B
(mm)
C
(mm)
T
(mm)
Weight (kg)
IP22
Enclosures
Click for
Drawing
pdf
dwg
50VA
76
80
65
15
1.0
WM1
75VA
76
80
65
15
1.0
WM1
100VA
100
72
85
15
2.0
WM1
150VA
100
85
75
15
2.0
WM1
200VA
100
85
85
15
3.5
WM1
250VA
120
100
95
20
3.5
WM1
300VA
120
100
95
20
3.75
WM1
400VA
120
100
120
20
4.25
WM1
500VA
140
115
115
20
6.0
WM2
650VA
140
115
125
25
7.25
WM2
750VA
140
115
140
25
8.0
WM2
1.0kVA
170
140
120
25
11
WM3
1.5kVA
170
140
155
25
15
WM3
2kVA
200
170
152
25
20
WM5
2.5kVA
200
170
180
25
26
WM5
3.0kVA
220
180
185
25
30
WM5
4.0kVA
235
200
220
25
35
FM00
5.0kVA
235
196
245
40
40
FM00
6.0kVA
290
250
240
40
55
FM0
7.0kVA
290
250
270
40
65
FM0

Units with voltages greater than 700V up to 6.6KV can be manufactured however the insulation requirements of these transformers will require a larger build size for the specific rating. Some units may convert to the larger Durham Range single phase transformer construction format.

Instrument transformers manufactured with small VA ratings and low regulation levels for accuracy tend to be manufactured on frame sizes approximately 10 to 20 times their VA rating

Share this product

Want to know more?

Get in touch and we’ll get back to you as soon as possible