db101013en / 09.2006 a-isometer? IR423 insulation monitoring device for mobile generators
2 db101013en / 09.2006 a-isometer? IR423 insulation monitoring device for mobile generators a-isometer? IR423 device features ? insulation monitoring for mobile gene- rators ac 0300 v ? option w: for high mechanical stress when using the protective measure pro- tective separation with insulation moni- toring and disconnection ? two separately adjustable response values ? connection monitoring system / earth ? power on led, led alarm 1, led alarm 2 ? internal and external test / reset button ? two separate alarm relays (one change- over contact each) ? n / o or n / c operation ? fault memory, selectable ? self monitoring with automatic alarm message ? multi-functional lc display ? adjustable response delay ? two-module enclosure (36 mm) product description the IR423 a-isometer? monitors the insulation resistance r f of an unearthed ac system of 0300 v to earth that is supplied by a mobile generator according to iec 60364-5-551 (din vde 0100-551). the IR423 is suitable for ac systems with operating frequencies 30 hz as well as for ac systems with directly connected dc circuits. the maximum permissible system leakage capacitance c emax is 5 f. application ? electrical installations in mobile or transportable units iec 60364-7-717: 2001; (require- ments for special installations and locations C mobile or transportable units) din vde 0100-717:2005 function the currently measured insulation resistance is indicated on the lc display. in this way any changes, for example when circuits are connected to the system, can be recognized easily. when the insulation resistance falls below the set response values, the response delay t on starts running. once the response delay t on has expired, the k1 / k2 alarm relays switch and the alarm leds al1 / al2 light up. two separately adjustable response values / alarm relays allow a distinction to be made between prewarning and alarm. if the insulation resis- tance exceeds the release value (response value plus hysteresis), the alarm relays return to their initial position. if the fault memory is enabled, the alarm relays remain in the alarm state until the reset button is pressed or until the supply voltage is switched off. the device func- tion can be tested using the test button. the parameterization of the device can be carried out via the lc display and the function keys integrated in the front plate. connection monitoring the connections to the system (l1 / l2) and to earth (e / ke) are either automatically checked every 24 h, or by pressing the test button or when supply voltage is applied. in case of inter- ruption of a connecting lead, the alarm relays k1 / k2 switch, the leds on // al1 // al2 flash and the following message appears on the display: ?e.02 indicating a fault in the connecting leads to the system, ?e.01 indicating a fault in the connecting leads to pe. after eliminating the fault, the alarm relays return to their initial position either automati- cally or by pressing the reset button. measuring principle the IR423 a-isometer? uses the measuring principle superimposed square-wave pulses. standards the IR423 type range complies with the standards: din en 61557-8 (vde 0413-8): 1998-05, en 61557-8: 1997-03, iec 61557-8: 1997-02, astm f 1669m-96: 2002, din vde 0100-551: 1997, iec 60364-5-551: 1994, iec 60364-7-717: 2001, din vde 0100-717: 2005.
db101013en / 09.2006 3 a-isometer? IR423 operating elements wiring diagram 1 - power on led, flashes in case of interruption of the connecting leads earth / ke or l1 / l2. 2 - alarm led al1, lights when the value falls below the set response value alarm 1 and flashes in case of interruption of the connec- ting leads earth / ke or l1 / l2. 3 - alarm led al2, lights when the value falls below the set response value alarm 2 and flashes in case of interruption of the connec- ting leads earth / ke or l1 / l2. 4 - lc display 5 - test button: to call up the self test arrow up key: parameter change, to move up in the menu 6 - reset button: to delete stored insulation fault alarms arrow down key: parameter change, to move down in the menu 7 - menu key: to call up the menu system enter key: to confirm parameter change 1 - supply voltage u s (see ordering details) via fuse 2 - separate connection of e, ke to pe 3 - connection of the ac system to be monitored: ac: connect terminals l1, l2 to conductors l1, l2. 4 - alarm relay k1: alarm 1 5 - alarm relay k2: alarm 2 6 - combined test and reset button, short-time pressing (< 1.5 s) = reset, long-time pressing (> 1.5 s) = test 7 - line protection by a fuse in accordance with din vde 0100-430 / iec 60364-4-43 (6 a recommended). in case of supply (a1 / a2) from an it system, both lines have to be protected by a fuse. 1 1 27 4 5 3 6 23 4 56 7
4 db101013en / 09.2006 a-isometer? IR423 application example for mobile generators, protective measure protective separation with insulation monitoring and disconnection setting k1 / k2 for overvoltage release: n / o operation (n.o.) setting fault memory: off setting k1 / k2 for contactor: n / c operation (n.c.) setting fault memory: on
db101013en / 09.2006 5 switching elements number of changeover contacts 2 x 1 changeover contact operating principle n / c operation / n / o operation (n / o operation)* electrical service life under rated operating conditions 10.000 operating cycles contact data acc. to iec 60947-5-1 rated operational voltage ac-13 ac-14 dc-12 dc-12 dc-12 utilization category 230 v 230 v 220 v 110 v 24 v rated operational current 5 a 3 a 0,1 a 0,2 a 1 a minimum current 1 ma at ac / dc 10 v environment / emc emc iec 61326-2-4 operating temperature - 40 c+ 70 c classification of climatic conditions iec 60721 stationary use (iec 60721-3-3) 3k5 (with condensation and formation of ice) transportation (iec 60721-3-2) 2k3 (except condensation and formation of ice) storage (iec 60721-3-1) 1k4 (except condensation and formation of ice) classification of mechanical conditions acc. to iec 60721: stationary use (iec 60721-3-3) 3m7 transportation (iec 60721-3-2) 2m2 storage (iec 60721-3-1) 1m3 connections connection screw terminals rigid / flexible / conductor sizes 0.24 / 0.22.5 mm 2 / 24-12 awg multi-conductor connection (2 conductors with the same cross section) rigid / flexible 0.21.5 / 0.21.5 mm 2 stripping length 8 mm tightening torque 0.50.6 nm other operating mode continuous operation position any position degree of protection, internal components (din en 60529) ip30 degree of protection, terminals (din en 60529) ip20 enclosure material polycarbonate din rail mounting acc. to iec 60715 screw fixing 2 x m4 with mounting clip operating instructions 101013 weight 150 g * = factory setting technical data a-isometer? IR423 a-isometer? IR423 insulation coordination acc. to iec 60664-1 / iec 60664-3 rated insulation voltage 250 v rated impulse voltage / pollution degree 2.5 kv / iii protective separation (reinforced insulation) between: (a1, a2) (l1, l2, e, ke, t/r) C (11, 12, 14) C (21, 22, 24) voltage test according to iec 61010-1 2.21 kv supply voltage supply voltage u s see ordering details power consumption 3 va it system being monitored nominal system voltage u n ac 0300 v rated frequency f n 30460 hz response values response value r an1 (alarm 1) 1200 k ( 46 k )* response value r an2 (alarm 2) 1200 k ( 23 k )* operating error 1 k 5 k /5 k 200 k 0.5 kv / 15 % hysteresis 25 % of response value specified time response time t an at r f = 0.5 x r an and c e = 1 f 1 s starting delay (start time) t 010 s (0 s)* response delay t on 099 s (0 s)* measuring circuit measuring voltage u m 12 v measuring current i m (at r f = 0 ) 200 a internal dc resistance r i 62 k impedance z i at 50 hz 60 k admissible extraneous d.c. voltage u fg dc 300 v permissible system leakage capacitance c e 5 f displays, memory display range, measuring value 1 k 1 m operating error 1 k 5 k /5 k 1 m 0.5 k / 15 % password off / 0999 (off)* fault memory alarm relay on / off (off)* outputs cable length test and reset button 10 m ordering information type nominal system voltage* u n supply voltage* u s art. no. IR423-d4w-2 ac 30460 hz 0300 v dc 70300 v / ac 30460 hz 70300 v b 9101 6305w IR423-d4w-1 ac 30460 hz 0300 v dc 9,694 v / ac 30460 hz 1672 v b 9101 6304w * absolute values accessories type art. no. mounting clip for screw fixing b 9806 0008 (1 unit required for each device)
dipl.-ing. w. bender gmbh & co. kg p.o. box 1161 ? 35301 grnberg ? germany londorfer stra?e 65 ? 35305 grnberg ? germany tel.: +49(0)6401 / 807-0 ? fax: 807 259 e-mail: info@bender-de.com ? www.bender-de.com right to modifications reserved ! C db101013en / 09.2006 / nbe ? dipl.-ing. w. bender gmbh & co. kg, germany dimension diagram xm420 dimensions are given in mm. open the front plate cover in direction of arrow ! screw mounting note: the upper mounting clip must be ordered separately (see ordering information).
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