100% Brand New MTL2000 range MTL2220 Earth-leakage detector has been discontinued now In Ready Stock has Good Price
The MTL2220 continuously monitors floating electrical circuits in a hazardous area, and warns if their resistance to earth falls below 10kΩ. It enables other MTL2000 and 3000 Series units to be used in the ‘no-fail’ mode, whereby earth faults on field lines can be detected and rectified without upsetting control or needing emergency action. The measuring circuit of the unit uses a 1Hz oscillator, amplifier and phase-sensitive demodulator to reject electrical interference up to 250V. A self-test facility enables the unit to be checked automatically or manually from time to time to ensure the integrity of the whole system. Testing is carried out by connecting two safe-area terminals together; this triggers an IS opto-coupler to connect a known resistance across the input terminals, de-energising the relay and LED if the unit is healthy, but having no effect on the monitored circuits. The changeover output contacts are duplicated within the unit for reliability
SPECIFICATION OF MTL2220
See also ‘Common specification’
Monitoring signal
4V, 0.1mA, 1Hz, intrinsically safe
Earth fault resistance to de-energise relay
<10kΩ, total for terminals 1 to 7
Earth fault resistance that will not de-energise relay
>30kΩ, total for terminals 1 to 7
Response time
<5s
50Hz rejection
250V rms, series mode
Contacts
1-pole changeover, duplicated within unit
Contact rating
250V,5A,500VA (ac), resistive loads, reactive loads must be
suppressed
250V,5A,250W (dc), resistive loads, reactive loads must be
suppressed
LED indicator
ON when relay energised (no earth fault)
Test facility
Unit is healthy if <2kΩ applied between terminals 12 & 13
de-energises relay and LED within 5s
Consumption
0.9 to 1.4W (ac versions)
60mA (24V dc version)
Ambient temperature limits
–20 to +55°C (all versions, close packed)
–20 to +60°C (all versions, at least 5mm apart)
–40 to +80°C (all versions, storage)
Safety description (each channel)
6.88V, 53kΩ, 0.13mA
FM max entity parameters
Voc = 8.3V, Isc = 21.7mA, Ca = 5.5µF, La = 75mH
MTL2220
MTL2215
MTL2213
MTL2211
MTL2210B
MTL2442B
MTL2441B
MTL2316
MTL2315
MTL2314
MTL2313
MTL2242
MTL2241
MTL2220
MTL2215
MTL2213
MTL2211
MTL2210B
Windy Wang
HONGKONG XIEYUAN TECH CO., LIMITED
Add: 7-A16,Caishen Commercial Plaza,Hankou Railway Station,Wuhan,China
Tel: +86-27-8588 3233 | Fax:+86-27-8530 9780 | Mobile/Whatsapp :+86 15972199006 | Skype: windy@hkxytech.com
Mail: windy@hkxytech.com
Website: http://www.hkxytech.com/ | GMT/UTC +8
