Home Products Electrical Safety Testers, Hipot/Insulation/Leakage Testers Partial Discharge Tester IMPULSE HIGH VOLTAGE DIVIDER ST1005

IMPULSE HIGH VOLTAGE DIVIDER ST1005

1000:1 high voltage divider from high accuracy voltage measurement to surge PD testing

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Versatile, Wideband Voltage Measurement from DC to Surge PD and Beyond

ST1005 is a high-accuracy voltage divider that converts high-voltage signals—up to 5 kV rms/7.1 kVpeak—at a 1000:1 ratio. With excellent frequency characteristics from DC to 10 MHz (–3 dB), it delivers a flat response across a wide frequency range. This makes it ideal not only for accurate voltage measurements and waveform observation at surge PD testing, but also for a wide variety of other high-voltage applications.

Key Features

  • Divides up to 5 kV rms/7.1 kVpeak input voltage at a 1000:1 ratio
  • Wideband frequency response: DC to 10 MHz (–3 dB)
  • High-accuracy voltage conversion: ±0.3% f.s. measurement accuracy (DC, 45 Hz to 66 Hz)

Model No. (Order Code)

ST1005
Please purchase the voltage cables for connecting the ST1005 to the DUT separately.

Accurately Convert High Voltage to Low Voltage

Maximum input voltage: 5 kV rms/7.1 kVpeak
Division ration: 1000:1
Measurement accuracy (amplitude): ±0.3 % f.s. (DC, 45 Hz to 66 Hz)

Most standard measuring instruments cannot directly measure voltages above 1000 V. By using the ST1005, high voltages up to 5 kV rms can be precisely scaled down with a 1000:1 division ratio. This enables safe and accurate measurement of high-voltage signals.


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Versatile for Applications from DC to Surge PD Testing

Measurement Bandwidth: DC to 10 MHz (–3 dB)

The ST1005 is ideal for high-voltage measurements across a wide frequency range. From accurate DC voltage measurement to capturing voltage waveforms in surge partial discharge (PD) testing, it supports a broad spectrum of applications.

 

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Basic specifications

Maximum rated common-mode voltage 5000 V rms, ±7100 V peak (Within the frequency derating curve)
Maximum rated line-to-ground voltage No measurement category: AC/DC 5000 V, ±7100 V peak, Anticipated transient overvoltage: 0 V
Measurement accuracy ±0.3% f.s.: DC, ±0.3% f.s.: 50/60 Hz
Measurement frequency
 DC to 10 MHz (-3 dB typ.)
Voltage dividing ratio 1000 : 1
Common-mode voltage rejection ratio (CMRR) 90 dB (typ.): 50/60 Hz
Operating temperature and humidity range -10°C to 50°C (14°F to 122°F), 80％RH or less (non-condensing)
Standards Safety: EN 61010, EMC: EN 61326 Class A
Power supply Rated supply voltage: AC 100 V to 240 V (50/60 Hz)
Dimensions and mass Approx. 195.0 mm (7.68 in.) W × 83.2 mm (3.28 in.) H × 346 mm (13.62 in.) D, Approx. 2.2 kg (77.6 oz.)
Compatible instruments (October 2025) ST4200-50 Partial Discharge Detector, SW2001 High Voltage Multiplexer
Included accessories L9218 Connection Cable (1.5 m), Power cord, Instruction manual, Operating precautions

Voltage Cord (4)

VOLTAGE CORD L1050-01

1.6 m

VOLTAGE CORD L1050-03

3.0 m

VOLTAGE CORD L1050-11

Red and black set: For connecting ST1005 to DUT, 1.6 m

VOLTAGE CORD L1050-13

Red and black set: For connecting ST1005 to DUT, 3.0 m

Connection Cable (2)

CONNECTION CABLE L1050-10

Red and black set: For connecting ST1005 to SW2001, 1.5 m

CONNECTION CABLE L9218

For connecting the ST4200 and SW2001, 1.5 m

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