单选题Which of the following statements represents the main difference between a relay and a contactor?（）AContactors control current and relays control voltageBA relay is series connected and a contactor is parallel connectedCContactors can handle heavier loads than relaysDContactors are made from silver and relays are made from copper
单选题
Which of the following statements represents the main difference between a relay and a contactor?（）
A
Contactors control current and relays control voltage
B
A relay is series connected and a contactor is parallel connected
C
Contactors can handle heavier loads than relays
D
Contactors are made from silver and relays are made from copper
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