G-IDC
Most Advanced Primary Current Injection Test System to simplify all types of switchgear and CT commissioning, circuit breaker testing and more
Up to 10000 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 corruption of test result
DESCRIPTION
This powerful test system is designed for primary injection testing of protective relay equipment and circuit breakers. It is 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 G-IDC can be quickly assembled and connected.
The control unit has many advanced features – a powerful measurement section for example, that can display turns ratio as well as time, voltage and current. A second measurement channel can be used to test an additional current or voltage. Current transformer turns ratio, impedance, power, power factor (cos φ) and phase angle are calculated and shown in the display. Current and voltage can be presented as percentages of nominal value. The fast-acting hold function freezes short-duration readings on the digital display when the voltage or contact signal arrives at the stop input, the object under test interrupts the current or injection is stopped.
APPLICATION
Primary current injection testing and breaker testing
These tests require high currents and the ability to measure very short duration, current flow. G-IDC 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-crossover point to ensure good repeatability and minimized DC offset.
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.
Polarity testing
The currents phase displacement is shown, and the polarities of the outputs are clearly marked.
Heat runs
G-IDC 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.
Automatic reclosers and sectionalizers
G-IDC 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.
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 G-IDC
Specifications are valid for an ambient temperature of +25°C and nominal input voltage. The specifications are subject to change without notice.
System designation
An G-IDC-system consists of a Control Unit and one Current Unit.
Environment
Application field The instrument is intended for use in medium-voltage substations and industrial environments.
Temperature
Operating 0°C to +50°C (+32°F to +122°F)
Storage & transport
-25°C to +55°C (-13°F to +127°F)
Humidity 5% – 95% RH, Non-condensing
Altitude (operational) <2000 m
Pollution degree 2
CE-marking
EMC 2014/30/EU
LVD 2014/35/EU
ROHS 2011/65/EU
General
Measurement
category
CAT I
Rated transient overvoltage: 2200 V
Mains voltage 100 – 240 V AC, 50/60 Hz
Mains inlet IEC 60309-1, -2. 16 A
Power
consumption
Input
voltage
Output
current
Input
current
240 V 2 kA 20 A
240 V 3.8 kA 45 A
120 V 2.5 kA 30 A
120 V 1 kA 12 A
Input current Output current x open circuit
voltage /input voltage
Protection The output transformer has a built-in
thermal cut-out, and the primary side is
protected by a miniature circuit breaker
Dimensions
Control Unit 546 x 347 x 247 mm
(21.5” x 13.7” x 9.7”)
Current Unit 410 x 340 x 205 mm
(16.1” x 13.4” x 8”)
Weight
Control Unit 20 kg (44 lbs)
Current Unit 21 kg (46.3 lbs)
Data transfer USB Type B Female
Display
Type LCD
Available
languages
English, German, French, Spanish, Swedish.
Outputs
Outputs in parallel, 240 mains voltage
Maximal
current
Maximum
generation
time
Minimum
rest time1)
Load
voltage
0A continuously – 3V 2)
700 A continuously – 2.6 V
1000 A 30 min 5 min 2.5 V
2000 A 3 min 10 min 2.1 V
3000 A 1 min 12 min 1.8 V
5000 A 2 sec 3 min 1.2 V
Outputs in series, 240 mains voltage
350 A continuously – 5.3 V
500 A 20 min 15 min 5.1 V
1500 A 2 min 12 min 3.5 V
1) Time to reset the thermal protection.
2) No load voltage
Measurement section
Ammeters
Measurement
method
AC 50/60 Hz, DC RMS
Inaccuracy 1% of range ±1 digit
Ammeter 1
Ranges
Serial Low 0 – 2.15 kA
Serial High 0 – 3.30 kA
Parallel Low 0 – 4.00 kA
Parallel High 0 – 6.50 kA
Resolution
0-999 A 1 A
1.00 – 6.50 kA 10 A
Ammeter 2
Ranges 0 – 2 A / 0 – 20 A
Voltmeter
Measurement
method
AC 50/60 Hz, DC RMS
Ranges 0 – 0.2 V, 0 – 2 V, 0 – 20 V,
0 – 200 V, AUTO
Inaccuracy 1% of range ±1 digit
Input resistance
(Rin)
240 kΩ (range 0 – 200 V)
24 kΩ (other ranges)
Dielectric
withstand
2.5 kV
Timer
Presentation In seconds, mains frequency cycles or
hours and minutes
Ranges 0.000 – 99999.9 s
0 – 9999 cycles
Inaccuracy ±(1 digit + 0.01% of value)
For the stop condition in INT-mode 1 ms
shall be added to the specified measurement
error.
Stop input
Max. input voltage 250 V AC / 275 V DC
Phase angle
Range 0 – 359º
Resolution 1º
Inaccuracy ±2º (For voltage and current readings
higher than 10% of the selected range)
Z, P, R, X, S, Q and power factor (cosϕ)
The result is calculated using U, I and j
Imax
Stores highest current value that exists ≥100 ms
INT-level
Threshold indicating that current is interrupted, can be set to approx.
0.5 or 2% of range for Ammeter 1