Redundant circuit for controlling heater in distribution cabinet

• Main Authors: JIN LIER, YANG SHICHEN, ZHANG JIAN, ZHI YUQING, CHEN QI, XIE JUN, WANG KAI, ZENG ZHENG, LIAO WEN, XIE LEI, ZHANG CHI
• Format: Patent
• Language: English
• Published: 08.04.2015
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES

The invention discloses a redundant circuit for controlling a heater in a distribution cabinet. The redundant circuit comprises a single chip, a redundant judging circuit and an OR gate circuit, wherein a control power source of the single chip is different from the control power source of the redundant judging circuit; a first output end of the single chip is connected with a first input end of the OR gate circuit; a second output end of the single chip is connected with an input end of the redundant judging circuit; an output end of the redundant judging circuit is connected with a second input end of the OR gate circuit; the output end of the OR gate circuit is connected with a relay in the distribution cabinet; the relay is used for controlling the switch-on/off of a heater loop of the heater in the distribution cabinet; if a pulse signal sent by the single chip is not received by the redundant judging circuit within 120 minutes, a high-level signal is outputted to the OR gate circuit; the heater is switched-on by switching on the relay by the OR gate circuit for a long term.