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    Time relays
Power-on delay relays
Off-delay relays
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Power-off delay relays (without auxiliary power supply)
Asymmetric repeat cycle relays
Repeat cycle relays
Star-delta relays
Multi-function time relays
    Phase sequence/absence relays
Phase sequence/absence relays
    Three-phase monitoring relays
Three-phase overvoltage monitoring relays
Three-phase undervoltage monitoring relays
Three-phase under/over voltage monitoring relays
Three-phase unbalance monitoring relays
Three-phase under/over voltage, unbalance monitoring relays
Phase sequence/absence relays
    Two-phase monitoring relays
Two-phase overvoltage monitoring relays
Two-phase undervoltage monitoring relays
Two-phase under/over voltage monitoring relays
    Single-phase monitoring relays
Undervoltage monitoring relays
Overvoltage monitoring relays
Under/over voltage monitoring relays
Window mode voltage monitoring relays
Under/over voltage monitoring relays (self-power supply)
    Current monitoring relays
Undercurrent monitoring relays
Overcurrent monitoring relays
Under/over current monitoring relays
Window mode current monitoring relays
    Frequency monitoring relays
Frequency monitoring relays
    Vol./Cur./Freq. all-in-one
More classification

Phase sequence/absence relays

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>  Time relays

>  Phase sequence/absence relays 

>  Three-phase monitoring relays

>  Two-phase monitoring relays  

>  Single-phase monitoring relays

>  Current monitoring relays

>  Frequency monitoring relay

>  Vol./Cur./Freq. all-in-one

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