Accessories
13
13.1 Accessories for 3RR2 current monitoring relays
13.1.1 Sealable cover
Description
A sealable cover for use with all sizes (3RR2940) is available for the 3RR2 current monitoring
relays with digital and analog setting.
The sealable cover is used to protect the rotary buttons and the slide switch on the current
monitoring relay with analog setting or the buttons on the current monitoring relay with digital
setting against unauthorized or unintentional tampering.
Siemens also oers a sealable membrane (3TK2820-0AA00) for securing the current monitoring
relays with analog setting. The sealable membrane is xed to the front of the device and secures
the rotary buttons and sliding switches against unintentional tampering.
Mounting
The diagram below shows an example mounting scenario based on mounting the sealable cover
on the 3RR21 current monitoring relay with analog setting, size S0. The mounting sequence for
the sealable cover for size S00 is exactly the same as that for size S0.
① Remove the key from the cover.
② Insert the key into the designated opening.
③ Attach the hooks on the cover to the openings on the current monitoring relay.
④ Tilt the cover down.
⑤ Lock the cover with the key connector to secure it against unauthorized removal.
Figure 13-1 Mounting the sealable cover on the 3RR2 current monitoring relay
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005 241
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