ABB Stykače a nadproudová relé

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Vydal: ABB s.r.o, ELSYNN Autor: ABB ELSYnn

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185 also suitable for currents of 65 . • rotection ith heavy starting Relays T450SU can used for particularly severe starting conditions. •R eference num bers the PTB: Type Reference No.5 times the setting current.4 time seconds. Use combination thermal overload relays and CUSTORAPID® recommended the case locked rotors motors with thermally critical rotors.. 92.Thermal overload relays T... They have been tested and approved the erm National Standards Laboratory“ (PTB) Braunschweig, Germany.. Tripping occurs <1. TA25. The values for the ratio pick-up current rated current and the shortest time are crucial, and these must specified the PTB Approval Certificate and the otor‘s rating plate. R t: Types E16DU, T7DU, TA25DU .g. operations per hour Use the CUSTORAPID® motor protection recommended for higher switching frequencies and alternating loading, e. C ondition delivered : Manual reset. Higher switching frequencies are permitted the duty ratio and the motor starting time are allowed for and the m otor‘s making current does not appreciably exceed times the rated operating current. Applications involving operations per hour are acceptable. This achieved looping the cables through several times.. When selecting the overload relay, check suitability the basis the tripping curves. This design means that tripping occurs between and +40 within the ranges defined IEC 947-4-1. See the adjacent curve for the extended range of -25 resp. Example: Starting time the motor: second Duty ratio: % means permitted switching frequency max.. • Special version EEx otors Relays T7DM, TA25DU .. 61. • Exam ple ita ility overload relay T/TA: The motor with increased safety has the following data: Output 7.. The setting ranges specified on Pages and apply non-recurrent looping through the cables. The relay may also used for lower motor rated currents. Description • itching frequency Thermal overload relays cannot operated any arbitrary switching frequency order avid tripping.e.5 kW, Ia/In 7. Exam ple : Tripping -25 °C.6 for looping the cables through three times. The special relay version for EEx motors differs from the normal version follows: • Special the tripping tim the rks • Special order code Tripping curves for the individual setting ranges and the PTB Approvals Certificates may ordered. In accordance with the adjacent tripping curve, the tripping time lies below the time the motor.5 the cables are looped through twice; the figures are 43. Ambient temperature ABB STOTZ-KONTAKT GmbH 17 2CDC 106 014 C0203 .. +55 °C. The setting range specified the rating plate inversely proportional the number cables looped through. for frequent starting and braking.. the tripping curve, starting from cold state, must run below the coordinate point Ia/In and the time. TA450DU/SU are suitable for protection EEx motors. The relay must trip within the time, i. TA45G PTB ATEX 3045 TA42, TA75, TABG PTB 02-32056 TA11G, TA2GG PTB 02-32057 TA45G PTB 02-32017 Limit values for tripping ambient temperatures other than °C A bient tem perature com pensation : The overload relays are protected against influences ambient temperature by bimetallic compensation element which detects the ambient temperature. TA450DU/SU feature convertible Manual/ Automatic reset..3 .. Please refer to the adjacent diagram for guideline values for the permitted switching frequency.. For instance: T450TU/SU with setting range 130