Established in 1990, China JouYang Electrical Products Co.,Ltd. is known as a leading protection relay, protective relay manufacturer and designer of high and low-voltage electric appliance in China. We integrate scientific research, development, production, sale and service in one company. Our custom protection relays, protective relays products are characterized by their superior dustproof, splash-proof, anticorrosion, fire-resistant, thermo-stability and aging-resistant properties. Having received ISO9001 certification for our manufacturing and sales systems, we have also been issued European 'CE' and Chinese 'CCC' safety authorizations for our products. All of our OEM protection relay, protective relay products are strictly according to IEC/GS/EMC/LICE/UL/CSA standard and guaranteed by People's insurance Corporation of China (PICC).

A portable, battery operated meter useful to every sound contractor or installer, this unique instrument will make measurements on 25, 50, 70, or 100 volt line systems. Sine waves are generated at 100 Hz, 330 Hz, 1 kHz, or 10 kHz to read impedance or calculated watts. A selector switch allows 200, 2k, or 20k ohm range for better accuracy. The LCD display has a low battery indicator. To assure that any distributed system is properly wired and presenting the correct impedance to the amplifier(s), the installer has the choice of reading the impedance in ohms or the calculated watts that the system should draw. For example, if the tap on the transformer is wired for 5 watts and a total of 10 speakers wired the same way are installed in the system, the ZM-1P will read 50 watts. Includes built in protection relay that prevents the meter from being damaged from amplifier output overloads up to 120VAC, a Tone Generator to improve system testing and performance and rechargeable batteries. Net weight: 3/4 lb.

The SMPR-1 has been designed to measure the line and the ground RMS currents and supply RMS voltages under normal conditions or under disturbances. This information is internally processed by the microprocessor, to take the protection actions defined by the user under ANSI, IAC or IEC standards. The operational conditions of
The breaker or disconnector are also signalized.
APPLICATIONS
Primary and backup protections for power plants, Utility and industrial distribution systems. Protection of transformers, overhead lines, cables And generators. Allows the opening of the switch/disconnector Within the limits of its capacity, leaving the circuit Interruption to the back-up fuses in case of short Circuit.