| Core Parameter Overview | |||||||||||
| The SACE Isomax S series comprises eight frame sizes (S1 to S8), covering a current range from 125A to 3200A. Below is an overview of its core features: | |||||||||||
| Frame Model | Rated current Iu (A) | Ultimate breaking capacity Icu (415V AC) | Overcurrent trip unit type | Extreme number | |||||||
| S1 | 125 | 16 - 25 kA | Thermomagnetic | 3, 4 | |||||||
| S2 | 160 | 16 - 50 kA | Thermomagnetic | 3, 4 | |||||||
| S3 | 160 - 250 | 35 - 85 kA | Thermomagnetic/Electronic | 3, 4 | |||||||
| S4 | 250 | 50 - 100 kA | Electronic type (PR211/P, PR212/P) | 3, 4 | |||||||
| S5 | 400 - 800 | 50 - 100 kA | Thermomagnetic/Electronic | 3, 4 | |||||||
| S6 | 800 | 65 - 120 kA | Thermomagnetic/Electronic | 3, 4 | |||||||
| S7 | 1200 - 1600 | 100 - 200 kA | Electronic (PR212/P) | 3, 4 | |||||||
| S8 | 2000 - 3200 | 100 - 200 kA | Electronic (PR212/P) | 3 | |||||||
| Note: Breaking capacity ratings are usually classified as N (standard type), H (high breaking capacity type), L (current limiting type), etc., and the specific values vary depending on the model and voltage. | |||||||||||
| Detailed technical specifications | |||||||||||
| The following are detailed parameters compiled from ABB's official technical manual: | |||||||||||
| 1. Thermal-magnetic circuit breakers (S1 - S3/S5/S6) | |||||||||||
| Suitable for AC or DC systems, it mainly relies on bimetallic strips and electromagnetic coils to achieve overload and short circuit protection. | |||||||||||
| Parameter Items | S1 | S2 | S3 | S5 | |||||||
| Rated current In (A) | 125 | 160 | 160 / 250 | 400 / 800 | |||||||
| Extreme number | 3, 4 | 3, 4 | 3, 4 | 3, 4 | |||||||
| Rated insulation voltage Ui (V) | 500 | 690 | 800 | 1000 | |||||||
| Rated impulse withstand voltage Uimp (kV) | 6 | 6 | 8 | 8 | |||||||
| Ultimate breaking capacity Icu (380/415V AC) | 25 kA | 50 kA | 65 kA (H type) | 100 kA (H type) | |||||||
| Ultimate breaking capacity Icu (500V DC) | —— | —— | 50 kA | 50 kA (3 poles in series) | |||||||
| Trip unit type | TMF (Thermomagnetic) | TMF (Thermomagnetic) | TMF / TMA (Thermomagnetic) | TMA (Thermomagnetic) | |||||||
| Mechanical life (times) | 25,000 | 25,000 | 25,000 | 20,000 | |||||||
| Electrical life (cycles) (415V) | 8,000 | 8,000 | 8,000 - 10,000 | 8,000 | |||||||
| External dimensions (W x H x D) (3P, mm) | 78 x 120 x 70 | 90 x 120 x 70 | 105 x 170 x 103.5 | 140 x 254 x 103.5 | |||||||
| Weight (kg, 3P) | 0.9 | 1.1 | 2.6 | 5.5 | |||||||
| 2. Electronic circuit breakers (S4 - S8) | |||||||||||
| Suitable for demanding power distribution systems, equipped with a microprocessor trip unit, providing more precise overload and ground fault protection. | |||||||||||
| Parameter Items | S4 | S5 | S6 | S7 | S8 | ||||||
| Rated current In (A) | 250 | 400 - 800 | 630 - 800 | 1200 - 1600 | 2000 - 3200 | ||||||
| Extreme number | 3, 4 | 3, 4 | 3, 4 | 3, 4 | 3 | ||||||
| Rated insulation voltage Ui (V) | 800 | 1000 | 1000 | 1000 | 1000 | ||||||
| Rated impulse withstand voltage Uimp (kV) | 8 | 8 | 8 | 12 | 12 | ||||||
| Ultimate breaking capacity Icu (380/415V AC) | 100 kA (L type) | 100 kA (L type) | 120 kA (L type) | 200 kA (V) | 200 kA (V) | ||||||
| Trip unit model | PR211/P, PR212/P | PR212/P | PR212/P | PR212/P | PR212/P | ||||||
| Protection function | LI / LSI / LSIG | LSI / LSIG | LSI / LSIG | LSI / LSIG | LSI / LSIG | ||||||
| Mechanical life (times) | 20,000 | 20,000 | 20,000 | 10,000 | 10,000 | ||||||
| External dimensions (W x H x D) (3P, mm) | 105 x 254 x 103.5 | 140 x 254 x 103.5 | 210 x 268 x 103.5 | 210 x 406 x 111 | 406 x 440 x 235 | ||||||
| Weight (kg, 3P) | 4.0 | 5.5 - 11.0 | 9.5 | 37.5 | 135 | ||||||
Trip Unit Function Description:
● LI: Overload protection (L) + Instantaneous short-circuit protection (I).
● LSI: Overload protection (L) + Short-time delay short-circuit protection (S) + Instantaneous protection (I).
● LSIG: Adds ground-fault protection (G) to the LSI configuration.
