Control
Transformers
During
the past 2 decades Mahendra Electrical Works has been engaged in
the development of low reactance transformers for use with electro-magnetic
control circuits. Given below are the salient features of our standard
range of Single phase Industrial Control Transformers and general
Purpose transformers.
A
Control Transformer is a transformer which supplies power to control
and /or auxillary equipment not intended for direct connection to
the main circuit. Control transformers are specifically used to
provide control supply voltages for the control circuits of AC motor
starters.
In addition Mahendra Electrical Works also manufactures a
range of general power transformers. These can be of the single
phase version or the 3 phase version with capacities from 1KVA to
50 KVA, system.
Charecteristics
of Control Transformers:
Mahendra Electrical Works
Industrial control Transformers are low reactance type, designed
to ensure good regulation at short time loads. To ensure superior
voltage regulation Mahendra Electrical Works Engineers devote appropriate attention to
reducing the percentage reactance and resistance drops in the transformer
design. Reduction of these values to a minimum greatly improves
secondary voltage regulation.
Testing:
Mahendra Electrical Works transformers are tested in accordance with our own stringent
quality control standards and a number of Electrical tests, including
turns ratio, exciting current, core loss and applied potential tests
are conducted to assure conformance to design specifications.
Information
required with enquiry/order
|
- Single
Phase or 3 phase
- Earthed
or unearthed systems
- Frequency
- Dry
Type or Oil immersed
- Rated
power in KVA and Rated short time Power in kva
- Highest
system voltage/Insulation level voltage
- Type
of Connection/Vector group
- Class
of Insulation
- Service
Condition
|
LT
Single Phase, 50 Hz Air Cooled Control Transformer upto 3.5kVA
Rating
in VA |
A(mm) |
B(mm) |
C(mm) |
D(mm) |
E(mm) |
Slot(lXb) |
Weight(Kgs) |
10
& 15 |
76 |
80 |
100 |
64 |
45 |
8X5 |
1.150 |
20
& 30 |
76 |
100 |
100 |
64 |
60 |
8X5 |
1.700 |
50
& 60 |
96 |
110 |
110 |
80 |
62.5 |
10X6 |
2.5 |
75
& 100 |
115 |
120 |
135 |
95 |
70 |
12X6 |
3.8 |
150
& 175 |
115 |
130 |
135 |
95 |
82.5 |
12X6 |
4.5 |
200
& 250 |
126 |
135 |
160 |
108 |
90 |
16X8 |
6.0 |
300
& 350 |
155 |
140 |
165 |
128 |
72 |
16X8 |
7 |
400 |
155 |
145 |
165 |
128 |
88 |
16X8 |
8.5 |
500 |
155 |
155 |
165 |
128 |
100 |
16X8 |
10.5 |
630 |
155 |
160 |
170 |
128 |
112.5 |
16X8 |
12 |
750 |
185 |
155 |
250 |
160 |
102 |
16X8 |
14 |
1000 |
185 |
155 |
250 |
160 |
102 |
16X8 |
15 |
1500 |
240 |
175 |
270 |
195 |
107.5 |
16X8 |
21 |
2000 |
240 |
185 |
270 |
195 |
120 |
16X8 |
29 |
2500 |
240 |
205 |
270 |
195 |
145 |
16X8 |
37 |
3000 |
235 |
235 |
270 |
160 |
145 |
20X10 |
42 |
3500 |
235 |
235 |
270 |
200 |
145 |
20X10 |
45 |
Note:
a.) Preferred Rated Primary Voltage : 110V, 240V & 415V
b.) Preferred Rated secondary Voltage : 24V, 48V, 110V, 240V
Tolerance: +/- 3mm
LT
Single Pahse, 50 Hz Air Cooled Control Transformer from 4 to 50kVA
Rating
in kVA |
A(mm) |
B(mm) |
C(mm) |
D(mm) |
E(mm) |
Approx
Weight(Kgs) |
4
& 5 |
300 |
240 |
450 |
200 |
155 |
65 |
6
& 7.5 |
350 |
260 |
500 |
250 |
155 |
82 |
10 |
400 |
280 |
550 |
300 |
160 |
95 |
15 |
450 |
300 |
600 |
380 |
165 |
120 |
20 |
500 |
350 |
650 |
380 |
165 |
135 |
25
& 30 |
550 |
375 |
700 |
450 |
185 |
160 |
40 |
600 |
375 |
700 |
450 |
195 |
185 |
50 |
700 |
400 |
750 |
500 |
225 |
210 |
|