Load ranges for horizontal and vertical applications
The following table shows the guidelines and restrictions when using the respective load ranges.
Brake | Application | Base load range | Permitted overload range (horizontal) | Permitted overload range (vertical) | |
|---|---|---|---|---|---|
Explosion protection | Functional safety (FS02/11) | ||||
BK.. | – | – | P1 | – | – |
EX, dust | – | P1 | – | – | |
EX, gas | – | – | – | – | |
BKB.. | – | – | P1 | – | – |
BP.. BR.. | – | – | S | – | – |
EX, dust | – | S | – | – | |
EX, gas | – | – | – | – | |
BY.. | – | ✔ | S | D | – |
– | |||||
EX, dust | – | S | D | – | |
EX, gas | – | – | – | – | |
BZ.. | – | ✔ | S | – | – |
– | |||||
EX, dust | ✔ | RD | – | – | |
– | |||||
EX, gas | ✔ | RG | – | – | |
– | |||||
✔ | Available |
– | Not available |
Notice: When using drives with BZ.. brakes in potentially explosive atmospheres, the limit values of load range S lead to the risk of explosion. For explosion-protected drives, the limit values of load range RD or RG must be used without exception.
Depending on the load range, the various brakes exhibit modified operating behavior and, in some cases, restrictions on the application range and the braking torque combinations, as shown in the following tables.
The following characteristic values depend on the load range:
- Maximum permitted speed nMax,1
- Permitted braking work for emergency-stop braking operations Wper,n and Wper,T
- Specific wear factor fv
- Reduction factors and correction factors fMmin and fMmax
The frame‑size‑dependent values for these parameters are provided in the following sections: Pulse frequencies, Permitted emergency stop braking work Wper, n, Limit speeds nmax,0 and nmax,1.
Load range | BK.. | BKB.. |
|---|---|---|
Standard P1 | Standard P1 | |
Application of the brake | Holding brake | |
Application for explosion-protected drives | Only for EX dust | Not permitted |
Application type | All (horizontal/vertical) | |
Maximum permitted braking torque level | All levels | |
Wear factor fV | Normal | |
Effective range of the dynamic braking torque min. (fMmin), max. (fMmax) | Normal | |
Maximum emergency-stop frequency ZB1max | 20 h-1 | 10 h-1 |
Required minimum pause time between two emergency stop events | 3 minutes | 6 minutes |
Load range | BP.. | BR.. |
|---|---|---|
Standard S | Standard S | |
Application of the brake | Holding brake | |
Application for explosion-protected drives | Not permitted | |
Application type | All (horizontal/vertical) | |
Maximum permitted braking torque level | All levels | |
Wear factor fV | Normal | |
Effective range of the dynamic braking torque min. (fMmin), max. (fMmax) | Normal | |
Maximum emergency-stop frequency ZB1max | 10 h-1 | 10 h-1 |
Required minimum pause time between two emergency stop events | 6 minutes | 6 minutes |
Load range | BY.. | BZ.. | ||
|---|---|---|---|---|
Standard S | Overload D | Standard S | Reduces RD/RG | |
Application of the brake | Holding brake | Holding brake | ||
Application for explosion-protected drives | Only for EX dust | Not permitted | RD: only for EX dust RG: only for EX gas | |
Application type | All (horizontal/vertical) | All (horizontal/vertical) | ||
Maximum permitted braking torque level | All levels | max. 75% MBmax | All levels | All levels |
Wear factor fV | Normal | Massively increased | Normal | Normal |
Effective range of the dynamic braking torque min. (fMmin), max. (fMmax) | Normal | Extremely expanded | Normal | Normal |
Maximum emergency-stop frequency ZB1max | 10 h-1 | 5 h-1 | ≤ 10 h-1 Observe the information below the table. | ≤ 5 h-1 Observe the information below the table. |
Required minimum pause time between two emergency stop events | 6 minutes | 12 minutes | ≥ 6 minutes Observe the information below the table. | ≥ 12 minutes Observe the information below the table. |
Information on the BZ.. brakes
During dimensioning of the BZ.. series, the permitted emergency‑stop frequency ZB1 is determined based on the calculated braking work. This frequency can also be smaller than the value for ZB1max given above.
Depending on the value of ZB1, a specific pause time must be observed between two emergency‑stop events in order to prevent overheating and damage to the friction system.
Value for ZB1 | Minimum required pause time in minutes |
|---|---|
1 | 60 |
> 1 – 3 | 20 |
> 3 – 5 | 12 |
> 5 – 10 | 6 |
