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7 Years
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| Brand Name : | SONTUOEC ,SONTUOC,STUOEC, WZSTEC |
| Model Number : | ST-96 |
| Certification : | CE |
| Price : | Negotiable |
| Payment Terms : | L/C, T/T |
| Supply Ability : | 3000pcs/day |
| Delivery Time : | 15days |
0 to 100A Analog panel meter voltmeter ammeter(A meter )
Maximum demand meters are intended for testing momentary thermal load of transformers, cables, electrical machines etc. The bimetallic movement responds and indicates the mean RMS current loading over a specified period of time. A black pointer which is attached to the bimetal spiral moves in response to the current -(heating) in the bimetal spiral. A red pointer (slave or memory pointer) is driven by the black pointer. The red pointer remains at its maximum position to which the black pointer has reached during any period of time. Further, when the loading is reduced, the red pointer remains at the maximum value. This enables the operator to know the maximum loading of the system without continuously watching the meter. A zero corrector is provided on the front of the meter to bring back the red pointer to the position of the black pointer. A sealing/locking facility is also provided on the zero corrector to prevent tampering of the reading at the red pointer. This series products have electromagnetic and magneto electric two types, which is applied for control system or power distribution system to display the corresponding electrical parameters, such as AC/DC current, AC/DC voltage, power factor, Hz, etc.
| Model Name | ST-96 and ST-72 |
| Accuracy class: | 1.5 |
For through current higher than 40A , Accuracy class is 2.5 | |
Specification of ammeters for through current : | 0.1A 0.5A 1A 1.5A 3A 5A 10A 15A 20A 25A 30A 40A 50A 60A 75A 100A.(Notice:For through current higher than 40A ,Accuracy class is 2.5.) |
Specification of ammeters for transformation ratio : | The meters should be used with a current transformer of which primary current is 10A 15A 20A 25A 30A 40A 50A 60A 75A 100A 20A 150A...10KA and external secondary current 1A or 5A. As long as overload rate and the incoming current keep the same, dial scales of all types in this series can be exchanged yet remain the accuracy. |
| Overload rate of Ammeters: | 1.non-overload 2.1.2times 3.2times 4.5times |
Specification of voltmeters for through voltage : | 30V 50V 75V 100V 120V 150V 200V 250V 300V 400V 450V 500V 600V |
Specification of voltmeters for transformation ratio : | The meters should be used with a voltage transformer of which primary voltage is 400V 450V 500V 600V 1000V 1500V 2000V 3000V 5000V….450KV and external secondary voltage 100V |
| Overload rate of voltmeters : | 1. non-overload 2.1.2times |
| Product performance: | All the meters are equipped with pure white silk-screen printing dial scale.The movement is made of intensive PBT plastics and permanent magnet steel so that it is vibration-resistant and heat resistant.The case is made of ordinary ABS plastics or flame retardant ABS plastics ,of which the resistant temperature can be up to 85°C.The base is made of PC plastics or flame retardant PC plastics,of which the resistant temperature can be up to 120°C . The resistant voltage is higher than 2000V. This kind of meter is easy to install with high-strengthen plastics grip piece by screwing down the nut so that the meter is of high immobility. |
Principles of measurement and the features: | Each electromagnetic meter consists of a magnet coil with a static sheet iron inside and a moving sheet iron with a tractive balance spring. When current flows through the magnet coil,magnetic field appears. Under such circumstance,the static and the moving sheet irons are magnetized simultaneously and remain the same polarity. According to the theory that the same polarities repel each other,repulsive force between the two irons makes the pointer deflect.When the torque and the restoring torque keep a balance,the pointer on the moving iron will point to a scale mark,which is the measured value. |
| Usage of the electromagnetic meter | The electromagnetic meters can be used for AC circuits under ordinary circumstance as well as for DC circuits instructed with TRMS. The structure of this kind of meters is simple,yet the accuracy is high,as well,they can be used for 50Hz/60Hz circuits. Special frequency should be marked out when the order is placed. |
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