Siemens HM656A User manual

Recommended tools:
5/16” socket,
Extension bar,
Torque wrench
1 / 10 (English)
400A & 600A
Mechanism Replacement Kit
Installation Instructions
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
I.L. No. 508533A00
Use only with Siemens certified components.
NOTE - These instructions do not purport to cover all details or
variations in equipment, or to provide for every possible
contingency to be met in connection with installation, operation
or maintenance. Should further information be desired or
should particular problems arise, which are not covered
sufficiently for the purchaser’s purposes, the matter should be
referred to the local Siemens sales office. The contents of this
instruction manual shall not become part of or modify any prior
or existing agreement, commitment or relationship. The sales
contract contains the entire obligation of Siemens. The
warranty contained in the contract between the parties is the
sole warranty of Siemens. Any statements contained herein do
not create new warranties or modify the existing warranty.
TRADEMARKS - Unless otherwise noted, all names identified
by ® are registered trademarks of Siemens AG or Siemens
Industry, Inc. The remaining trademarks in this publication may
be trademarks whose use by third parties for their own
purposes could violate the rights of the owner.
Cat. #: HM656A
Item: HM656A
For use with: 400A & 600A VBII Safety Switches,
Series “A”
Handle Grommet (1)
Type 3R, 12 & 4X
units only
Interlock Grommet (1)
Type 3R, 12 & 4X
units only
Sealing washer (4)
Type 4X units only
#10 – 32 x .312”L (4)
Mechanism Mounting Screws
All Unit Types
Mechanism (1)
All Unit Types

Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
2 / 10 (English) I.L. No. 508533A00
1. Prepare switch for mechanism replacement.
Turn OFF and lock out all power supplying this device before working on the device.
Turn OFF the switch
Verify that NO voltage is present at the wire grips.
Remove any installed fuses (Fusible Switches).
Rotate line shields for access to line base mounting screw as shown in Fig’s 1 & 2.
Remove all conductors from the line base.
2. Remove the Line Base Mounting Screws as shown in Fig. 2. Keep hardware for re-installation.
(View shows line shield rotated.)
Fig. 1
Line Base
Mounting Screw
Line Base
Mounting Screw
Fig. 2

3. Slide the Line Base assembly away from mechanism assembly until the rotor clears the mechanism
assembly as shown Fig’s. 3 & 4.
4. Lift the line base assembly and enclosure barrier out of enclosure as shown Fig. 5.
3 / 10 (English) I.L. No. 508533A00
Enclosure Barrier
(keep for re-installation)
Line Base Assembly
Fig. 5
Fig. 4
View shown for clarification.
Rotor Assembly
Rotor Assembly
Mechanism Assembly
Fig. 3
Enclosure
Barrier
Line Base Assembly
Mechanism
assembly

I.L. No. 508533A00
5. Remove all 3 existing handle guard mounting screws, sealing washers (type 4X) , #10-32 nuts (type 4X)
and handle guard as shown in Fig 6. Do not throw components away.
6. Remove the two existing handle mounting screws and handle as shown in Fig. 7. Do not throw away
components.
Fig. 7
Fig. 6
Handle Guard
4 / 10 (English)

Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death orserious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
I.L. No. 508533A00
7. Remove the mechanism mounting screws and sealing washers as shown in Fig. 8.
8. Dispose of the mechanism and it’s hardware as shown in Fig. 9.
Fig. 9
Fig. 8
5 / 10 (English)

I.L. No. 508533A00
9. For Type 3R, 12 & 4X enclosures, place the new handle grommet and interlock grommet onto the
enclosure as shown in Fig 10. When properly seated, the enclosure sidewall will be captivated within
the groove in the grommet.
10. Align the new mechanism through the grommets openings. Mount the Mechanism with the
Mechanism Mounting Screws (and sealing washers for type 4X) as shown in Fig’s. 11 & 12.
6 / 10 (English)
Fig. 10
Enclosure Inside Surface
Fig. 11
Fig. 12
Torque to 30 lb-ins.
(3.39 Nm)

I.L. No. 508533A00
11. Place the handle onto the Mechanism as shown in Fig. 13. Secure with (2) #10-32 x 0.5” screws (saved
from Step 6 above).
12. Place the handle guard onto the enclosure as shown in Fig. 14. Secure with (3) #10-32 x 0.312” screws
(saved from Step 5 above). Include sealing washers and #10-32 nuts for type 4X enclosures only.
Fig. 13
7 / 10 (English)
Torque to 30 lb-ins.
(3.39 Nm)
Torque to 30 lb-ins.
(3.39 Nm)
Fig. 14
Handle Guard
10-32 Nut
(Type 4X Only)
Sealing Washer
(Type 4X Only)

13. Place the enclosure barrier and line base assembly into enclosure as shown Fig. 15.
14. Slide the line base assembly towards the mechanism assembly. Insert the end of rotor into the
mechanism assembly until the line base mounting holes are aligned as shown in Fig’s 16 & 17.
8 / 10 (English) I.L. No. 508533A00
Fig. 16
Enclosure Barrier
Line Base Assembly
Enclosure Barrier
Line Base Assembly
Fig. 15
Fig. 17
View shown for clarification.
Rotor Assembly
Rotor Assembly
Mechanism Assembly
WARNING
Electrical Shock Hazard
Could cause death or serious injury
Ensure the Enclosure Barrier is properly installed before restoring power

Fig. 18
Torque to
30 lb-ins.
(3.39 Nm)
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
9 / 10 (English) I.L. No. 508533A00
Note the order of the first 2 (of 6) mounting screws
to secure the Line Base Assembly.
Fig. 19
1 st2 nd
15. Secure the line base assembly with six #10-32 x 5/8” screws (from Step 2 above) into the enclosure as
shown in Fig.18. See Fig 19 for the sequence of the line base mounting screw placement.

Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
Turn off and lock out all power supplying this device before
working on this device.
Replace allcovers before powersupplying this device is
turned on.
Couper l'alimentation de l'appareil et barrer avant de
travailler.
Remplacez touts les couverts avant que
l'approvisionnement depouvoir soit alimenté.
Tensión peligrosa.
Puedecausarla muerte o lesiones graves. Tension dangereuse. Danger de mort ou risque de blessures graves.
Hazardous Voltage.
Will cause death or serious injury.
Desenergice totalmente antes de instalar o darle servicio.
Reemplace todas las barreras y cubiertas antes de
energizar el interruptor.
16. While all power supplying the Safety Switch is still OFF and locked out:
a. Hold Interlock Lever below the front of the enclosure to operate switch with the door open.
(See Fig. 14) Move the safety Switch handle to the ON position.
b. Cycle the mechanism while checking for smooth switch operation and moveable contact
movement. If the switch does not operate in a smooth manner, or if there are any questions
about the replacement kit installation, contact Customer Service 1-800-241-4453.
c. Turn the Safety Switch OFF.
17. Reinstall line conductors. Torque lugs to the wire tightening torque values listed in the Terminal
& Wire Information Table on the interior label.
18. Rotate line shields as shown in Fig.20.
19. Install fuses, if removed in step 1.
20. Close cover before restoring power to the safety switch.
Fig. 20
Interlock Lever
Line Shield
Subject to change without prior notice © Siemens Industry Inc. 2015
Siemens Industry Inc., Norcross, GA 30092 10 / 10 (English)
Technical Support: Toll Free: 1-800-241-4453 Internet: www.usa.siemens.com/powerdistribution
I.L. No. 508533A00