Testing medium-voltage protection relays in the field without carrying a laptop takes a three-phase injection set with its own control, enough power and built-in test modules. The AK-6 does it with a Windows CE system, a 6.4-inch TFT display, panel keyboard and rotary encoder, and injects 3×35 A (3×450 VA), 1×105 A (900 VA) single-phase and up to 4×300 V (4×110 VA), with a guaranteed accuracy of 0.07 % of reading + 0.03 % of range at 0-130 V and five test modules: DC, AC, distance, harmonic and frequency.
AK-6 key data
- Current: the AK-6 delivers 3×0-35 A (3×450 VA) or 1×0-105 A (900 VA), with guaranteed accuracy < 0.14 % rd + 0.06 % rg and typical 0.05 % rd + 0.02 % rg at 0-35 A, and 1 mA resolution.
- Voltage: 4×0-300 V L-N (4×110 VA) and 2×0-600 V L-L (2×220 VA) on the AK68i; the AK68 works with 4×130 V. Guaranteed accuracy of 0.07 % rd + 0.03 % rg at 0-130 V and 1 mV resolution.
- Frequency, phase and time: 0-1000 Hz with 0.001 Hz resolution and drift < 0.001 Hz between 10 and 450 Hz; phase from −360° to +360° with accuracy < 0.2°; time measurement from 0 to 9999.999 s with 1 ms accuracy.
- Test modules: the AK-6 tests automatically or manually DC, AC, distance and zero sequence, harmonics of order 2 to 9 and frequency protection.
- DC and auxiliary sources: 0-300 V / 180 W and 0-20 A / 300 W (60 A with 3 L-N), plus a 0-300 V / 0.6 A auxiliary DC supply for the relay.
- Binary inputs and outputs: 8 pairs of inputs compatible with 10-250 V and 4 pairs of outputs rated 250 V / 3 A AC and DC.
- Standalone operation: Windows CE, 6.4-inch TFT display, panel keyboard and rotary encoder; RJ45 and USB ports for updates, reports and data transfer.
- In the field: 220 V ±20 %, 50/60 Hz, 1000 VA supply; operation from −5 °C to +55 °C; 24 kg and 360 × 460 × 140 mm, usable vertically or horizontally.
Advantages
Field testing without a laptop
An all-in-one design with built-in Windows CE, a 6.4-inch TFT display, panel keyboard and rotary encoder runs the five test modules — DC, AC, distance, harmonic and frequency — on its own.
High power, high accuracy
The unit provides 4×300 V (4×110 VA at 0-300 V) and 3×35 A (3×450 VA at 0-35 A) for medium-voltage tests, with a guaranteed accuracy of 0.07 % of reading plus 0.03 % of range at 0-130 V.
Full signal control
Amplitude, frequency and phase are independently and continuously adjustable, with a frequency range up to 1000 Hz and 0.001 Hz resolution.
Protected and reliable
Complete self-protection and alarms cover wrong wiring, open or short circuit, overheating and overload.
Built for the field
A compact, lightweight case can be placed vertically to save space, with RJ45 and USB ports for firmware updates and data transfer.
Applications
- Testing of protection relays at medium-voltage level.
- Distance, harmonic and frequency protection testing.
- DC and AC injection with time measurement.
- On-site commissioning and periodic maintenance.
About the product
The AK-6 combines high burden with a compact, lightweight case, an integrated 6.4-inch TFT display, panel keyboard and rotary encoder for full control without a PC, and RJ45 and USB ports for updates and data transfer; it can be placed vertically where bench space is limited.
Technical specifications
| Design | All-in-one; Windows CE, 6.4-inch TFT, keyboard and rotary encoder |
| Test modules | DC, AC, distance, harmonic and frequency |
| Voltage output | 4×300 V (L-N); 4×110 VA at 0-300 V; 2×600 V (L-L) |
| Current output | 3×35 A (L-N); 3×450 VA at 0-35 A |
| Voltage accuracy | 0.07 % rd + 0.03 % rg guaranteed at 0-130 V |
| Frequency | 0-1000 Hz; resolution 0.001 Hz |
| Phase | -360° to +360°; accuracy < 0.2° |
| DC source | 0-300 V / 180 W; 0-20 A / 300 W (60 A, 3 L-N) |
| Protection | Wrong wiring, open/short circuit, overheat and overload |
| Connectivity | RJ45 Ethernet and USB for updates and data transfer |
| Current accuracy | < 0.14 % rd + 0.06 % rg guaranteed; 0.05 % rd + 0.02 % rg typical (0-35 A) |
| Binary inputs / outputs | 8 pairs (10-250 V) / 4 pairs (250 V, 3 A AC/DC) |
| Power supply, weight and dimensions | 220 V ±20 %, 50/60 Hz, 1000 VA; 24 kg; 360 × 460 × 140 mm |
Frequently asked questions
What is the difference between the AK68 and the AK68i?
The voltage output. Both AK-6 models inject 3×35 A (3×450 VA) or 1×105 A single-phase; the AK68 provides 4×130 V and the AK68i 4×300 V L-N (4×110 VA), with 2×600 V phase to phase.
How accurate is the AK-6?
For voltage, 0.07 % of reading + 0.03 % of range guaranteed at 0-130 V; for current, < 0.14 % rd + 0.06 % rg guaranteed and 0.05 % rd + 0.02 % rg typical at 0-35 A. Phase is set with accuracy < 0.2° and times are measured with 1 ms accuracy.
Does it need a PC?
No. It has a built-in Windows CE system with a 6.4-inch TFT display, panel keyboard and rotary encoder, so it runs standalone.
What test modules does it have?
Five: DC test, AC test, distance test, harmonic test and frequency protection.
How much can it inject?
4×300 V (4×110 VA at 0-300 V) and 3×35 A (3×450 VA at 0-35 A) for medium-voltage level tests.
Can it be used vertically?
Yes. The compact, lightweight case can be placed vertically to save space on site.
How are results transferred?
Through the RJ45 Ethernet and USB ports, which also handle firmware updates.
