Page 183 - SACE Tmax XT - Catalogue

ACCESSORIES 7/37

Electronic time-delay device for undervoltage release - UVD
The undervoltage release can be combined with an electronic time-delay device for the circuit-breaker,
allowing for delayed external tripping with adjustable preset times. Use of the delayed undervoltage
trip unit is recommended to prevent tripping when the power supply network for the trip unit is subject
to brief voltage drops or power supply failures. Circuit-breaker closing is inhibited when the UVD is not
powered. The time-delay device must be used with an undervoltage release with the same voltage.

— Circuit-breaker Power supply voltage [V AC/DC]
Time delay device for XT1…XT4 24…30
undervoltage release
XT1…XT4 48…60
XT1…XT4 110…125
XT1…XT4 220…250
Delay which can be set [s] 0.25 - 0.5 - 0.75 - 1 - 1.25 - 2 - 2.5 - 3
XT5 - XT6 24…30
XT5 - XT6 48...60
XT5 - XT6 110…125
XT5 - XT6 220…250
Delay which can be set [s] 0.5 - 1 - 1.5 - 2 - 3
XT7 24…30
XT7 48
XT7 60
XT7 110…125
XT7 220…250
Delay which can be set [s] 0.5 - 1 - 1.5 - 2 - 3
07
Motor Operators
These are devices that allow circuit-breaker opening and closing:
• in remote mode, by means of electric controls;
• locally, directly from the front, by means of a special mechanism.
Direct action motor operator - MOD

Signaling of the
Position for key circuit-breaker status ON-OFF
lock (optional)
Slot for padlock device

— Slot for the
Direct action motor operating lever
operator (MOD) AUTO-MANUAL selector

Lever case: under the cover
there is the thermal-mag-
netic trip unit rotary switch
to set thermal protection
Test push-button