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ABB Dynamic braking / DC drive

From:ABB | Author:Wang | Time :2025-01-07 | 435 visit: | 🔊 Click to read aloud ❚❚ ▶ | Share:

ABB Dynamic braking / DC drive

Description
Drive contactors are specifically designed for use with solid state D.C. adjustable speed drive systems. In drive
applications, the contactor is not required to make or break the load during normal operation. The N.C. contact
is used for dynamic braking applications. EHDB contactors are provided less terminal lugs. Additionally, EHDB
contactors carry elevator service ratings.
Type DA
• 60 A continuous
• 160…300V DC dynamic braking
• Double-break contacts
• Identical H/W dimensions to standard A-line
• DIN rail and panel mount
• cULus Recognized – File # E312527
• Motor Controllers, Magnetic – Component (NLDX2,
NLDX8)
Type EHDB
• 220..960 A continuous
• 600V DC dynamic braking
• Double-break contacts with magnetic arc chutes
• Elevator service rated
• Replacement parts available
• cULus Recognized – File # E36588
• Motor Controllers, Magnetic – Component (NLDX2,

NLDX8

Electrical ratings 2 & 3 pole non-reversing
DC continuous
current (A)
N.O. power
poles
N.C. dynamic
braking pole Standard
auxiliary contacts
Catalog number
2-pole
2 N.O.
Catalog number
3-pole
2 N.O. + 1 N.C. DC make/break DC make DC break
500V 500V 500V 150V 300V N.O. N.C.
Type DA75, 2 & 3 pole
60 60 - - - 1 1 DA75-20-11-Δ -
60 60 90 55 - 2 1 - DA75-21-21-Δ
60 60 90 - 55 1 1 - DA75-21A-11-Δ
Note: DA75 2 & 3 pole contactors are equipped with polarity-dependent N.O. contacts.
DC continuous
current (A)
N.O. power
poles
N.C. dynamic
braking pole Standard
auxiliary contacts
Catalog number
2-pole
2 N.O.
Catalog number
3-pole
2 N.O. + 1 N.C. DC make/break DC make DC break
600V 600V 600V 300V N.O. N.C.
Type EHDB, 2 & 3 pole
220 333 450 285 1 1 EHDB220C2P-ΔL EHDB220C-ΔL
280 425 565 363 1 1 EHDB280C2P-ΔL EHDB280C-ΔL
360 556 728 472 1 1 EHDB360C2P-ΔL EHDB360C-ΔL
520 780 1040 680 1 1 EHDB520C2P-ΔL EHDB520C-ΔL
650 975 1300 850 1 1 EHDB650C2P-ΔL EHDB650C-ΔL
800 1200 1600 1050 1 1 EHDB800C2P-ΔL EHDB800C-ΔL
960 1440 1920 1250 1 1 EHDB960C2P-ΔL EHDB960C-ΔL


Rated control circuit
voltage Uc
DA75 EHDB220...
EHDB360
EHDB520...
EHDB960
24V/50 81 N -
24V/60 81 F -
24V DC - Y Y
48V/60 83 G -
48V DC - W W
110/50, 110…120/60 84 1 1
125V DC - Q Q
208V/60 34 B B
220V DC - R R
240V/60 80 2 2
277V/60 42 C C
480V/60 51 4 4
600V/60 55 6 6
Example:
24V DC input voltage: EHDB280C-YL
120V AC input voltage: DA75-21-21-84
DC continuous
current (A)
N.O. power
poles
N.C. dynamic
braking pole Standard
auxiliary contacts
Catalog number
2-pole
2 N.O.
Catalog number
3-pole
2 N.O. + 1 N.C. DC make/break DC make DC break
500V 500V 500V 150V 300V N.O. N.C.
Type DA75, 2 & 3 pole
60 60 - - - 1 1 DA75M-20-11-Δ -
60 60 90 - 55 1 1 - DA75M-21A-11-Δ
Note: DA75 2 & 3 pole contactors are equipped with polarity-dependent N.O. contacts.
DC continuous
current (A)
N.O. power
poles
N.C. dynamic
braking pole Standard
auxiliary contacts
Catalog number
2-pole
2 N.O.
Catalog number
3-pole
2 N.O. + 1 N.C. DC make/break DC make DC break
600V 600V 600V 300V N.O. N.C.
Type EHDB, 2 & 3 pole
220 333 450 285 1 1 EHDB220M2P-ΔL EHDB220M-ΔL
280 425 565 363 1 1 EHDB280M2P-ΔL EHDB280M-ΔL
360 556 728 472 1 1 EHDB360M2P-ΔL EHDB360M-ΔL
520 780 1040 680 1 1 EHDB520M2P-ΔL EHDB520M-ΔL
650 975 1300 850 1 1 EHDB650M2P-ΔL EHDB650M-ΔL
800 1200 1600 1050 1 1 EHDB800M2P-ΔL EHDB800M-ΔL
960 1440 1920 1250 1 1 EHDB960M2P-ΔL EHDB960M-ΔL
Note: The polarity of the N.C. dynamic braking pole must be respected; 5/L2 (+) – 6/T2 (-).


Rated control circuit
voltage Uc
DA75 EHDB220...
EHDB360
EHDB520...
EHDB960
24V/50 81 N -
24V/60 81 F -
24V DC - Y Y
48V/60 83 G -
48V DC - W W
110/50, 110…120/60 84 1 1
125V DC - Q Q
208V/60 34 B B
220V DC - R R
240V/60 80 2 2
277V/60 42 C C
480V/60 51 4 4
600V/60 55 6 6
Example:
24V DC input voltage: EHDB280M-YL
120V AC input voltage: DA75M-21A-11-84

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