Block Open Frame 25 kVA Auto-Transformer, 208 V ac, 200 V Primary, 400 V ac Secondary
- RS Stock No.:
- 738-7890
- Mfr. Part No.:
- AT3 25-20/21-4
- Brand:
- Block
Image representative of range
Subtotal (1 unit)*
£2,082.06
(exc. VAT)
£2,498.47
(inc. VAT)
FREE delivery for orders over £60.00
Temporarily out of stock
- Shipping from 03 September 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 + | £2,082.06 |
*price indicative
- RS Stock No.:
- 738-7890
- Mfr. Part No.:
- AT3 25-20/21-4
- Brand:
- Block
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Block | |
| Primary Voltage | 208 V ac, 200 V | |
| Product Type | Auto-Transformer | |
| Secondary Voltage | 400 V ac | |
| Construction | Open Frame | |
| Mount Type | Wall, Chassis, Floor Standing | |
| Termination Type | Screw | |
| Secondary Power | 25kVA | |
| Minimum Operating Frequency | 50Hz | |
| Maximum Operating Temperature | 40°C | |
| Maximum Operating Frequency | 60Hz | |
| Weight | 103.00kg | |
| Depth | 440mm | |
| Length | 480mm | |
| Series | AT3 25-20/21-4 | |
| Standards/Approvals | C-UL-US, CSA 22.2, VDE 0532, IEC 61558-2-13, VDE 0570 part 2-13, UL 506, DIN EN 61558-2-13 | |
| Width | 220mm | |
| Select all | ||
|---|---|---|
Brand Block | ||
Primary Voltage 208 V ac, 200 V | ||
Product Type Auto-Transformer | ||
Secondary Voltage 400 V ac | ||
Construction Open Frame | ||
Mount Type Wall, Chassis, Floor Standing | ||
Termination Type Screw | ||
Secondary Power 25kVA | ||
Minimum Operating Frequency 50Hz | ||
Maximum Operating Temperature 40°C | ||
Maximum Operating Frequency 60Hz | ||
Weight 103.00kg | ||
Depth 440mm | ||
Length 480mm | ||
Series AT3 25-20/21-4 | ||
Standards/Approvals C-UL-US, CSA 22.2, VDE 0532, IEC 61558-2-13, VDE 0570 part 2-13, UL 506, DIN EN 61558-2-13 | ||
Width 220mm | ||
- COO (Country of Origin):
- DE
AT3 Series Autotransformers
Range of high efficiency low heat loss 3 phase auto transformers
Common input and output windings
Easy installation-mounting holes provided
Screw terminal connections
Reverse operation posible
Transformers tested to EN 61558-2-13
BLOCKIMPEX vacuum impregnation
Approvals
UL 5085-1/2 CSA 22.2
Related links
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