Maximum demand scale

Product Overview

1. Measuring range: 
1.1 Maximum Demand Indicator
1.1.1  Maximum Demand Indicator with Bimetallic Movement
1.2 Maximum Demand Indicator
1.2.1 Combined Maximum Demand Indicator with Bimetallic Moving-Iron Ammeter
>Maximum Demand Indicator (MDI) is panel mount meter. The thermal/time characteristics of MDI meters can monitor the most economic use of cable, protective device and transformers. Indicating mean RMS current in the circuit within a given period of time, also record the maximum RMS current. Combining moving-iron measuring system can measure the instantaneous value.
>MDI can be divided into 3 categories, with bimetallic movement, with moving- iron ammeter or with alarm relay.
>The demand value is indicated by black moving pointer. The maximum demand value is indicated by red slave pointer, which can be resumed by reset knob. It can be lead-sealed for prevention of unauthorized reset. Technical Specification:
> Thermal time delay: 15 minutes.
Accuracy class: 3.0(Precise reading start from 25% of full scale). Overload: Continuously: 1.2 times rated current,
Short duration: 10 times rated current for 1 second.
With Saturating CT:20 times rated current for l second. Power consumption:<3VA.
A) Maximum Demand Indicator with Bimetallic Movement Measuring the maximum load average value (indicated by black pointer). 
B) Combined Maximum Demand Indicator with Moving-Iron Ammeter>Combined Maximum Demand Indicator and Moving-iron ammeter, measuring maximum average load value (indicated by black horizontal pointer); Transient value (indicated by black vertical pointer), accuracy class is 1.5. 

2. Temperature Range of Operation
>All panel meters can operate trouble-free at room temperatures ranging from -20℃ to +40℃

3. Temperature Range of Storage
>-40℃ to +70℃

4. Insulation Test
>The test voltage is 2kV RMS for 1minute with the frequency 50Hz, All requirements conform to IEC61010-1