Voltage instrument transformer

VTS 12P.Z1

Instrument voltage transformers VTS 12P.Z1 are single-phase single-pole insulated transformer designed for usage in high-voltage networks.

They are designed for the measuring and protection of distribution devices of internal construction. The devices are equipped with an HV fuse to protect the surrounding distribution system.

Values of the secondary voltages are 100/√3, 110/√3, 120/√3; values of the auxiliary voltages are 100/3, 110/3, 120/3 V.

Accuracy classes of the measuring coils are 0.2, 0.5, 1, 3 and accuracy classes of the protective coils are 3P and 6P.

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Description

Instrument voltage transformers VTS 12P.Z1 are single-phase single-pole insulated transformer designed for usage in high-voltage networks. They are designed for the measuring and protection of distribution devices of internal construction. The devices are equipped with an HV fuse to protect the surrounding distribution system.

Values of the secondary voltages are 100/√3, 110/√3, 120/√3; values of the auxiliary voltages are 100/3, 110/3, 120/3 V.

Accuracy classes of the measuring coils are 0.2, 0.5, 1, 3 and accuracy classes of the protective coils are 3P and 6P.

The transformers fulfill the required accuracy class within the range of 25 % to 100 % of the rated burden.

The body of VTS 12P.Z1 transformers contains an epoxy adapter with SIBA fuse (0.3 A or 0.6 A) or VPO T32 or T50 (32 or 50 mA). The fuse can be removed or inserted using a screwable epoxy tube (see “The Installation instructions”). The HV contact can be floppy for installation in a distributing board or fixed using an M6 screw (see the drawing). If the fixed contact is used, a cable eye is recommended according to the cross section of the used conductor.

The magnetic circuit of the voltage transformers is made of oriented transformer strips in the shape of the “C” core.

All active parts of transformer are compound-insulated with epoxy-mixture. This material performs both the electrical insulating and the mechanical functions.

Transformers are fixed by the means of four screw in the holes in the basic plate.

The outlet of primary winding „A“ is brought out by the means of bolt M10.

ATTENTION: The isolators must not be pre-stresses mechanically in the direction away from the body of transformer during the other way of contacting.

We recommend use terminal ends corresponding to the used cross-section of the conductor for attaching to the secondary outlets.

The secondary terminal board is equipped with a cover and a sealing screw. There is an additional pack inside which contains jumpers and screws to earth the coil. (See“The Instructions for the mounting and operation”.)

In cases where the replacement of an older transformer (different producers) is required, we provide VTS 12P.Z1 devices on modified base plates that have the same installation dimensions as the replaced type.

Instrument voltage transformers VTS 12P.Z1 comply with all tests according to ČSN EN 61869-3.

We can provide official calibration if so required by the customer.

This transformer is not designed as a self-locking one. To protect the appliance from destruction due to non-standard effects such as overvoltage, ferroresonance, transients etc., the transformer must be equipped with suitable transformer protection. For more information about non-standard effects and protection please visit our website www.kpbintra.cz under “support” section.

Highest voltage for equipment: 12/17.5 kV
Power frequency test voltage: 28/38 kV
Lightning impulse test voltage: 75/95 kV
Nominal primary voltage: 3000/√3 – 15000/√3 V
Nominal secondary voltage: 100/√3, 110/√3, 120/√3 V
Nominal auxiliary voltage: 100/3, 110/3, 120/3 V
Accuracy class – measurement: 0.2, 0.5, 1, 3
Accuracy class – protection: 3Р, 6Р
Nominal power: 5 – 150 VA
Max power: this information will be provided only at the customer's request
Nominal frequency: 50 Hz
Weight: 23 kg
Thermal insulation class: E
Operation conditions: operating temperature from -5 °C to +40 °C
Standard: ČSN EN 60044-2, IEC EN 60044-2, ČSN EN 61869-1, ČSN EN 61869-3, IEC EN 61869-1, IEC EN 61869-3, GOST 15 150