TS_ / TRS_ summation current transformers with 2–5 inputs
Country: Spain · Model: TS_ / TRS_
The TS_ and TRS_ summation transformers accept from 2 to 5 input circuits of 5 A each and deliver at one output a current proportional to the sum. They are needed when one meter, analyzer or ammeter handles the metering of several incomers, busbar sections or groups of outgoing lines.
- Models
- TS_ (plastic housing), TRS2, TRS3, TRS4, TRS5 (resin-cast)
- Number of inputs
- 2–5 (5+5 … 5+5+5+5+5 A)
- Burden
- 10 VA (TRS)
- Condition
- summation of CTs with the same transformation ratio
Technical specifications
| Models | TS_ (plastic housing), TRS2, TRS3, TRS4, TRS5 (resin-cast) |
|---|---|
| Number of inputs | 2–5 (5+5 … 5+5+5+5+5 A) |
| Burden | 10 VA (TRS) |
| Condition | summation of CTs with the same transformation ratio |
| Rated voltage | 720 V AC |
| Test voltage | 3 kV, 1 min |
| Dynamic current | 2.5 Ith |
| Functions | earthing of one secondary point to PE if needed |
Replacement for
no direct analogue; closest — TShP-0.66, T-0.66 with intermediate current transformers
selected by purpose and main parameters, please confirm with the manager
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The secondary circuits of the main current transformers, with the same transformation ratio, are connected to the input windings, and the sum is taken from the output winding. The secondary cables meet at one point, and if necessary one point of the secondary circuit is connected to the protective earth PE. TRS2, TRS3, TRS4 and TRS5 are resin-cast for longer life and have 2, 3, 4 and 5 inputs (5+5, 5+5+5, 5+5+5+5 and 5+5+5+5+5 A) at a burden of 10 VA. TS_ is made in a plastic housing for the same purpose. The rated voltage is 720 V AC, the test voltage is 3 kV for 1 min, and the dynamic current is 2.5 Ith. A CE declaration has been issued for the TRS series.
How to choose
The number of inputs equals the number of lines to be added, so for two lines take TRS2 and for five TRS5. All input transformers must have the same transformation ratio, otherwise the sum will be wrong. The cast TRS housing is chosen for a longer service life, and the plastic TS_ for ordinary boards. If one transformer can be installed on a common incomer, it is simpler to take TUC_ for 50–6000 A.
Request a price and lead time
TS_ / TRS_ summation current transformers with 2–5 inputs. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How many inputs does a summation transformer have?
From two to five. TRS2, TRS3, TRS4 and TRS5 are designed for 2, 3, 4 and 5 inputs of 5 A respectively.
What should the transformation ratio of the main CTs be?
The same. The secondary circuits are connected to the input windings, and the sum is taken from the output one.
What burden and voltage does the series have?
The TRS burden is 10 VA, the rated voltage is 720 V AC, and the test voltage is 3 kV for 1 min.
Can the secondary circuit be earthed?
Yes, one point of the secondary circuit is connected to the protective earth PE if needed. The dynamic current is 2.5 Ith.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.