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Special Watch: Durable Hour Run Meter from China Suppliers & Factory - 9999.99 Display, AC Voltage Options
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Measuring Range
1.1 Hours Run Meter
- Hour Run Meter with built-in synchronous motor, features six-digit readout with no reset function, making them virtually tamper proof.
- All hour meters are time indication.
- Display: 9999.99
Operating Voltage
AC 100V / 200–250V / 380V
Accuracy Class
0.5
1.2 Phase Sequence Indicator
- Monitoring phase sequence in three-phase power network system.
- Applicable on 100~150V or 150~500V three-phase power network.
- When the rotation of disc with arrow sign is clockwise, it means wrong sequence. Exchanging any two of the three "hot" wires will obtain the correct phase sequence.
- Each test should not be longer than 5 minutes.
Operating Voltage
AC 100–150V / 150–500V
Operating Frequency
50Hz / 60Hz
1.3 Digital Synchroscope (with Relay Output)
Indicating the status if power generator and network are synchronized. When the voltage and frequencies between power generator and network are consistent, rotation of LED Roulette will slow down until the SYNC LED is on. Both systems can then be synchronized and the generator connected to the power network. Model prefix with relay output: S-DR.
Relay Output — Condition A:
1. Voltage difference between UB and UGEN is less than pre-set value S1 (△U × UN);
2. Frequency difference between FGEN and FBUS is less than pre-set value S2 (△F);
3. Pre-set time difference before phase difference is 0°, S3 (Time);
→ When all 3 conditions are satisfied, the synchronized signal will be released.
Relay Output — Condition B:
Voltage difference between UBB and UGEN is less than pre-set value S1 (△U × UN); phase difference between UBB and UGEN satisfies pre-set value S2 (△φ), and within the pre-set delay time (Delay), phase difference between UBB and UGEN still satisfies pre-set value S2 (△φ).
→ Synchronized signal will be released.
Operating Voltage
AC 57V / 100V / 220V / 380V / 415V / 440V
Operating Frequency
50Hz / 60Hz
Accuracy Class
15° (Electrical angle 15°~345°)
3° (Electrical angle 345°~15°)
3° (Electrical angle 345°~15°)
1.4 Double Meter
- Double meter can be used to measure two independent parameters; saving space and installation time.
- Ideal partner for power generators or equipment.
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Note: Measurement on Voltage & Frequency or Voltage & Current can be customized on request.
1.4.1 Double AC Voltmeter
Measuring Range
0–10V to 500V
Accuracy Class
1.5
1.4.2 Double AC Ammeter
Measuring Range
0–5A (Connection on CT)
Accuracy Class
1.5
1.5 Net Insulation Monitor (MΩ Meter)
- Monitoring the insulation resistance of ungrounded power networks.
- When insulation resistance is lower than the preset value, its relay releases an alarm.
Categories by Principle Method:
| Type | Description |
|---|---|
| a) Integrated | Monitor with measuring system. Can be customized with self-detection. "Monitor" mode: Ordinary monitoring, works as normal. "Suspend" mode: Invalid — does not check insulation resistance; pointer points at ∞. "Test" mode: Self-detection — pointer points at 0, alarm LED lit, relay activated. |
| b) Separated | Monitor and measuring system are separated. |
| c) Double Circuit | Monitors the insulation resistance of two ungrounded power networks simultaneously. |
Relay (Load Resistance) — Technical Specification:
Load Resistance: DC 30V, 5A | AC 250V, 5A
NO (Normally Open): When value is less than alarm limit, relay operates; normally open changes from break to closed.
NC (Normally Close): When value is greater than alarm limit, relay operates. Until the value is less than alarm limit or meter power is cut off, relay releases; normally close contact breaks connection and closes.
⚠️
Important: Before changing the preset value, please ensure there is no voltage applied.
Max Voltage of Measuring Circuit
AC 500V / 690V
Measuring Range
0–1MΩ / 0–5MΩ / 0–10MΩ
Auxiliary Power
AC 57.7 / 100 / 220 / 380 / 450V
Accuracy Class
1.5
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Temperature Range of Operation
🌡️ All panel meters can operate trouble-free at room temperatures ranging from -20°C to +40°C.
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Temperature Range of Storage
🌡️ Storage temperature range: -40°C to +70°C.
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Insulation Test
⚡ The test voltage is 2kV RMS for 1 minute at a frequency of 50Hz. All requirements conform to IEC 61010-1.
Frequently Asked Questions (FAQ)
Q
What is the display format of the Hours Run Meter and can it be reset?
The Hours Run Meter features a six-digit readout with a display format of 9999.99. It has no reset function, making it virtually tamper-proof and ideal for accurate long-term time recording.
Q
How does the Phase Sequence Indicator detect incorrect phase sequence?
The Phase Sequence Indicator uses a rotating disc with an arrow sign. If the disc rotates clockwise, it indicates a wrong phase sequence. To correct it, simply exchange any two of the three "hot" wires. Note that each test should not exceed 5 minutes.
Q
What does the SYNC LED on the Digital Synchroscope indicate?
When the voltage and frequency between the power generator and the network reach consistency, the LED Roulette rotation slows down until the SYNC LED illuminates. This indicates that both systems are synchronized and it is safe to connect the generator to the power network.
Q
Can the Double Meter measure both voltage and current simultaneously?
Yes. The Double Meter is designed to measure two independent parameters at the same time. Measurement combinations such as Voltage & Frequency or Voltage & Current can be customized upon request, making it a flexible solution for power generators and equipment panels.
Q
What are the three types of Net Insulation Monitor available?
The Net Insulation Monitor is available in three types: (a) Integrated — monitor with a built-in measuring system supporting self-detection modes (Monitor, Suspend, Test); (b) Separated — monitor and measuring system are independent units; and (c) Double Circuit Integrated — capable of monitoring two ungrounded power networks simultaneously.
Q
What are the operating and storage temperature ranges for these panel meters?
All panel meters are designed to operate reliably at temperatures between -20°C and +40°C. For storage, the acceptable temperature range is -40°C to +70°C, ensuring durability across a wide range of environmental conditions.