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We are offering educational institutions. The capacitance & tan delta model- qctd -1k is transformer arm ratio type bridge. It is a special development for accurate capacitance and tan delta tests on electrical insulation systems the bridge is provided with modes selector switch so that once the object is connected; it can be measured in different modes without handling the test leads features both measurements of capacitance & tan delta built in power supply unit, standard capacitor and balancing bridge unit. Provision of calibrator to quickly verify the proper operation and calibration of the bridge. Specially designed for engineering colleges lab test voltage 1000v. This low voltage makes the instrument very safe to operate and easy to understand the concept of capacitance and tan delta testing. Provision of guard terminal. No external automatic guard potential regulator is required. Three different measurement modes can be conveniently selected by a selector switch. Suitable for both grounded as well as ungrounded objects. Test voltage 0 to 1kvac rated current : 50ma continuous output frequency 50hz (lines frequency) switch for three different types measurement 1. Ust- ungrounded specimen test. 2. Gst - grounded specimen test. 3. Gstg - grounded specimen test with guard. Indication : 3 ½ digital panel meter for voltage . Standard capacitor :100pf, 1kv built-in. Input voltage : 230vac + 10%, single phase, 50hz safety features : zero start control. Open ground indicating lamp with double ground connection. External interlock ht cut off on overload. Ht on and supply on indication. All operating controls at earth potential. Necessary terminals & sockets for connection to object.