The INGVAR primary current injection test system is a powerful instrument designed for primary injection testing of protective relay equipment and circuit breakers. It's also used to test the turns ratio of current transformers and for other applications that require high variable currents.
The system consists of a control unit and a current unit. The two parts are portable and INGVAR can be quickly assembled and connected.
The control unit has many advanced features, such as a powerful measurement section that can display turns ratio as well as time, voltage, and current. A second measurement channel can also be used to test an additional current or voltage.
The INGVAR can calculate the current transformer turns ratio, impedance, power, power factor/tan delta (cos φ), and phase angle and the results are shown on the display. The current and voltage can be presented as percentages of nominal value. It also has a fast-acting hold function that freezes short-duration readings on the digital display, so when the voltage or contact signal arrives at the 'stop' input, the object under test interrupts the current, or the injection is stopped.
| Key Features |
| Most advanced primary current injection test system to simplify all types of switchgear and CT commissioning, ground grid, circuit breaker testing, and more |
| Up to 5000 A output current |
| Two units, each of about 20 kg (44 lbs), simplifies transportation |
| Unique I/30 function allows the current to be pre-set using low current to prevent test sample heating, thus eliminating test result corruption |
| Benefits |
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| Primary Current Injection Testing and Breaker Testing | These tests require high currents and the ability to measure very short duration, current flow.
INGVAR has been designed especially to meet these needs.
No extra contacts are needed to measure the operating time of a low-voltage breaker.
Testing stops at the instant when the main breaker contacts open to interrupt the current.
Output current initiation is synchronized with the currents zero-cross-over point to ensure good repeatability and minimized DC offset.
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| Testing Current Transformers | For turns ratio testing, the primary current and either the secondary current or the turns ratio are displayed simultaneously.
Since the turns ratio is displayed directly as the nominal value (1000/5 for example), no further calculation is needed.
Burden of secondary circuits can be measured and presented in VA.
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| Polarity Testing | The currents phase displacement is shown, and the polarities of the outputs are clearly marked. |
| Heat Runs | INGVAR is ideal for performing heat runs. Current can be applied continuously or through programmable intervals.
The times can be shown in minutes and hours which facilitates long-term testing capability.
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| Automatic Reclosers and Sectionalizers | INGVAR can also be set to test circuit breakers with reclosing relays.
Operating limits, partial times, total times and the number of operations before lockout can be measured.
User-selectable reclosing sequences can be programmed for testing sectionalizers.
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| Testing Integrity of Safety-Ground Devices | One way to test safety-ground devices is by injecting current through the safety-ground and measure the voltage drop to get the impedance. |
| Specifications |
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INGVAR
Primary Current Injection Test System
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| Model Overview |
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| Model (Part Number | Description |
INGVAR
(BH-72490)
| Primary Current Injection Test System |
| Included Accessories |
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| GA-12700 | Interconnection cable 3 m (10 ft) - Qty 1 |
| GA-12051 | Current cable 2 m (6.5 ft) 120 mm2 - Qty 2 |
| 04-00080 | Mains cable 2.5 m (8 ft) - Qty 1 |
| GA-00204 | Grounding cable 5 m (16 ft) - Qty 1 |
| Optional Accessories |
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| AA-90165 | HCP2000, High Current Probe |
| BH-90130 | Current Transformer Switchbox |
| GA-12705 | Extension interconnection cable INGVAR, 5 m (16 ft) |
| GA-12710 | Extension interconnection cable INGVAR, 10 m (32 ft) |
