The HSL-2 hand-operated push-pull interlocking mechanism is used in unit drawers. The interlocking mechanism features three-position locking, three-position display, drawer-cabinet interlocking when the switch is closed, and auxiliary power supply for testing and connection. The drawer is pushed in and pulled out by the drawer door handle (similar to the MNS large interlocking push-pull method; the main switch is locked to the partition when closed, locking the drawer; the drawer can only be pulled out after the main switch is opened and unlocked; the unlock button on the left handle must be pressed to pull out the drawer). It is recommended for drawers with current below 250A. For 630A drawers, our company's HJG-8 hand-cranked push-pull mechanism can be used. The HJG-8 interlocking mechanism is easy to operate, fully meets protection requirements, is inexpensive, and highly practical. The structural diagram is provided by our company.
| Model Selection (H) | Standard Square Rod (A) | Non-Standard Square Rod (A) |
| 57 | 8×8 | 10×10 |
| 67 | 8×8 | 10×10 |
| 117 | 10×10 | 8×8 |
