The Magus MSJY-30KV Insulation Resistance Tester is a high-voltage megohmmeter designed for substations, power engineering contractors, and HV test engineers. It measures insulation resistance up to 30TΩ with 7 test voltage ranges (500V, 1000V, 2500V, 5000V, 10KV, 15KV, 20KV, 25KV, 30KV), and automatically calculates Polarization Index (PI) and Dielectric Absorption Ratio (DAR).

With a built-in 16.8V lithium-ion battery, digital filtering, and superior anti-interference performance, the MSJY-30KV delivers accurate, reliable insulation testing in the field.

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Why Choose the Magus MSJY-30KV?

– 7 test voltage ranges — 500V, 1000V, 2500V, 5000V, 10KV, 15KV, 20KV, 25KV, 30KV, plus manual voltage regulation

– Insulation resistance up to 30TΩ @ 30kV

– Adjustable short-circuit current — up to 5mA (10mA customizable)

– Auto PI and DAR calculation — Polarization Index and Dielectric Absorption Ratio

– Leakage current and capacitance measurement

– Superior anti-interference— Accurate even with 2mA interference current

– Dual power supply — Lithium-ion battery, up to 4 hours runtime (10000V @ 100MΩ)

– **Insulation resistance simulation column — Visual indication

– Digital filtering — Reduces external influence deviation

-Complete protection — Spare fuse prompt function

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Key Applications

– Substation insulation testing

– Power cable insulation resistance measurement

– Transformer insulation testing

– Motor and generator insulation testing

– Switchgear and busbar insulation testing

– Capacitor discharge and capacitance measurement

– Preventive maintenance and commissioning

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Technical Specifications

Safety Standard

– IEC 61010-1 CAT.IV 600V

– IEC 61326 EMC specification

– IEC 60529 IP64 (outer closed state)

– AC Power: 110V-220V ±10%, 50/60Hz, 20VA

– Battery: 16.8V Lithium-ion rechargeable battery

– Battery Life: 10000V @ 100MΩ, 4 hours

– Size (L×W×H): 37cm × 27cm × 17cm

– Weight: 3.6kg

– Test voltage accuracy: nominal value 100% to 110%

– Voltage measurement accuracy: 5% + 3V

– Current test range: 10mA

– Current measure precision: 5% + 0.2nA

– Short-circuit current: 2-5mA adjustable (10mA customizable)

– Capacitance test range: 20uF

– Capacitance testing accuracy: 15% + 0.03uF

**Insulation Resistance Range and Accuracy (T: 23±5°C, RH: 45-75%)**

Range	500V	1000V	2500V	5000V	10000V	15000V	20000V	25000V	30000V	Accuracy
Low	＜1MΩ	＜1MΩ	＜1MΩ	＜1MΩ	＜1MΩ	＞1MΩ	＞1MΩ	＜1MΩ	＜1MΩ	5% (≤20000V) / Unspecified (25000‑30000V)
Mid	1M‑10GΩ	1M‑20GΩ	1M‑100GΩ	1M‑100GΩ	1M‑200GΩ	1M‑300GΩ	1M‑400GΩ	1M‑400GΩ	1M‑600GΩ	20% (≤20000V) / 5% (25000‑30000V)
High	10G‑100GΩ	20G‑200GΩ	100G‑1TΩ	100G‑1TΩ	200G‑2TΩ	300G‑3TΩ	400G‑4TΩ	500G‑5TΩ	600G‑6TΩ	Unspecified (≤20000V) / 20% (25000‑30000V)
Max	＞100GΩ	＞200GΩ	＞1TΩ	＞1TΩ	＞2TΩ	＞3TΩ	＞4TΩ	＞5TΩ	＞6TΩ	Unspecified

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Standard Accessories

1. High-pressure silica gel test line (red, green, black) — 1 set

2. AC power line — 1

3. Operating manual — 1

4. Certificate of soundness — 1

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Frequently Asked Questions (FAQ)

**Q1: What is the maximum insulation resistance range?**

A: Up to 30TΩ at 30kV.

Q2: What test voltages are available?

A: 500V, 1000V, 2500V, 5000V, 10KV, 15KV, 20KV, 25KV, 30KV, plus manual voltage regulation.

Q3: Does it calculate PI and DAR automatically?

A: Yes. It automatically records 15s, 60s and 600s values and calculates PI and DAR.

Q4: How long does the battery last?

A: Up to 4 hours (10000V @ 100MΩ).

Q5: Can it measure capacitance?**

A: Yes. Capacitance test range is 20uF.

Q6: What is the short-circuit current?

A: 2-5mA adjustable (10mA customizable).

Q7: Is it suitable for field use?

A: Yes. IP64 rated, 3.6kg, with lithium battery and rugged carry case.

Q8: What safety standards does it meet?

A: IEC 61010-1 CAT.IV 600V, IEC 61326 EMC, IEC 60529 IP64.

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