Square D Digest 179

Thermal Units

Thermal Unit Selection Thermal Unit Selection Tables

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Thermal Unit Table 135 (index and instructions: page 16-134 to page 16-138) Motor FLC (A)

Thermal Unit Table 136 (index and instructions: page 16-134 to page 16-138) Motor FLC (A)

Thermal Unit Number

Thermal Unit Number

1T. U.

3T. U.

1T.U.

3T. U.

0.77–0.88 0.89–1.02 1.03–1.19 1.20–1.37 1.38–1.62 1.63–1.90 1.91–2.12 2.13–2.46 2.47–2.83 2.84–3.19 3.20–3.61 3.62–3.89 3.90–4.32 4.33–4.57 4.58–5.19 5.20–5.79 5.80–6.16 6.17–6.94 6.95–7.99 7.80–8.99 9.00–9.98 9.99–10.6 10.7–11.6 11.7–13.1 13.2–14.2 14.3–15.4 15.5–17.6 17.7–20.0 –

0.85–0.95 0.96–1.09 1.10–1.21 1.22–1.35 1.36–1.56 1.57–1.76 1.77–1.94 1.95–2.22 2.23–2.57 2.58–2.87 2.88–3.21 3.22–3.50 3.51–3.79 3.80–4.04 4.05–4.53 4.54–5.03 5.04–5.36 5.37–5.97 5.98–6.89 6.90–7.79 7.80–8.53 8.54–9.09 9.10–9.99 10.0–10.9 11.0–11.7 11.8–13.4 13.5–15.4 15.5–17.9 18.0–20.0

B1.30 B1.45 B1.67 B1.88 B2.10 B2.40 B2.65 B3.00 B3.30 B3.70 B4.15 B4.85 B5.50 B6.25 B6.90 B7.70 B8.20 B9.10 B10.2 B11.5 B12.8 B14.0 B15.5 B17.5 B19.5 B22.0 B25.0 B28.0 B32.0

0.98–1.09 1.10–1.24 1.25–1.41 1.42–1.59 1.60–1.81 1.82–2.04 2.05–2.19 2.20–2.52 2.53–2.90 2.91–3.29 3.30–3.69 3.70–3.99 4.00–4.42 4.43–4.69 4.70–5.37 5.38–5.94 5.95–6.34 6.35–7.05 7.06–8.14 8.15–9.39 9.40–10.3 10.4–11.1 11.2–12.2 12.3–13.5 13.6–14.7 14.8–16.1 16.2–18.3 18.4–20.0 – 18.4–20.9 21.0–23.6 23.7–25.0 –

0.88–0.98 0.99–1.13 1.14–1.26 1.27–1.38 1.39–1.62 1.63–1.82 1.83–2.04 2.05–2.36 2.37–2.72 2.73–3.07 3.08–3.44 3.45–3.69 3.70–4.11 4.12–4.34 4.35–4.89 4.90–5.44 5.45–5.80 5.81–6.47 6.48–7.45 7.46–8.49 8.50–9.29 9.30–9.99 10.0–10.8 10.9–12.1 12.2–13.1 13.2–14.6 14.7–16.4 16.5–18.9 19.0–20.0 – 19.0–20.9 21.0–24.1 24.2–25.0

B1.30 B1.45 B1.67 B1.88 B2.10 B2.40 B2.65 B3.00 B3.30 B3.70 B4.15 B4.85 B5.50 B6.25 B6.90 B7.70 B8.20 B9.10 B10.2 B11.5 B12.8 B14.0 B15.5 B17.5 B19.5 B22.0 B25.0 B28.0 B32.0 B28.0 B32.0 B36.0 B40.0

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

For Type 20 A Starter. Select Thermal Units from above.

For Type DPSO12 & DPSO13, 20 A Starter. Select Thermal Units from above.

18.0–20.2 20.3–23.2 23.3–25.0

B32.0 B36.0 B40.0

20.1–22.7 22.8–25.0 –

For Type 25 A Starter. Select any of the Thermal Units from above.

For Type DPSO22 & DPSO23, 25 A Starter. Select any of the Thermal Units from above.

22.8–26.1 26.2–29.6 29.7–30.0

– 23.3–25.8 25.9–28.6

B36.0 B40.0 B45.0

– 24.2–27.2 27.3–30.0

B36.0 B40.0 B45.0

23.7–27.2 27.3–30.0

For Type 30 A Starter. Select any of the Thermal Units from above.

For Type DPSO33, 30 A Starter. Select any of the Thermal Units from above.

Thermal Unit Table 146 (index and instructions: page 16-134 to page 16-138) Motor FLC (A)

Thermal Unit Table 145 (index and instructions: page 16-134 to page 16-138) Motor FLC (A)

Thermal Unit Number

Thermal Unit Number

1T.U.

3T.U.

1T.U.

3T.U.

3.90–4.22 4.23–4.49 4.50–5.14 5.15–5.78 5.79–6.23 6.24–7.03 7.04–8.23 8.24–9.31 9.32–10.1 10.2–10.7 10.8–11.9 12.0–13.1 13.2–13.9 14.0–15.9 16.0–18.0 18.1–20.8 20.9–23.1 23.2–26.9 27.0–31.4 31.5–36.0 36.1–38.8 38.9–41.7 41.8–46.3 46.4–50.0

3.60–3.89 3.90–4.15 4.16–4.76 4.77–5.30 5.31–5.70 5.71–6.46 6.47–7.65 7.66–8.55 8.56–9.36 9.37–9.9 10.0–10.9 11.0–12.0 12.1–12.8 12.9–14.2 14.3–16.0 16.1–18.5 18.6–21.2 21.3–24.9 25.0–28.0 28.1–31.7 31.8–34.6 34.7–37.4 37.5–40.0 40.1–46.4 46.5–50.0

B5.50 B6.25 B6.90 B7.70 B8.20 B9.10 B10.2 B11.5 B12.8 B14.0 B15.5 B17.5 B19.5 B22.0 B25.0 B28.0 B32.0 B36.0 B40.0 B45.0 B50.0 B56.0 B62.0 B70.0 B79.0

1.00–1.11 1.12–1.27 1.28–1.36 1.37–1.53 1.54–1.78 1.79–2.02 2.03–2.20 2.21–2.52 2.53–2.94 2.95–3.30 3.31–3.70 3.71–4.02 4.03–4.46 4.47–4.69 4.70–5.37 5.38–5.94 5.95–6.34 6.35–7.09 7.10–8.46 8.47–9.32 9.33–10.2 10.3–10.9 11.0–12.1 12.2–13.4 13.5–14.2 14.3–16.0 16.1–18.1 18.2–20.5 20.6–23.5 23.6–27.2 27.3–30.8 30.9–35.0 35.1–37.2 37.3–40.0

0.91–1.02 1.03–1.15 1.16–1.27 1.28–1.39 1.40–1.61 1.62–1.84 1.85–2.03 2.04–2.34 2.35–2.69 2.70–3.02 3.03–3.39 3.40–3.65 3.66–4.04 4.05–4.28 4.29–4.85 4.86–5.38 5.39–5.71 5.72–6.39 6.40–7.53 7.54–8.34 8.35–9.14 9.15–9.74 9.75–10.7 10.8–11.8 11.9–12.2 12.3–14.4 14.5–16.4 16.5–18.9 19.0–21.3 21.4–23.3 23.4–27.9 28.0–31.4

B1.30 B1.45 B1.67 B1.88 B2.10 B2.40 B2.65 B3.00 B3.30 B3.70 B4.15 B4.85 B5.50 B6.25 B6.90 B7.70 B8.20 B9.10 B10.2 B11.5 B12.8 B14.0 B15.5 B17.5 B19.5 B22.0 B25.0 B28.0 B32.0 B36.0 B40.0 B45.0 B50.0 B56.0

—

For Type DPSG52 & DPSG53, 50 A Starter. Select any of the Thermal Units from above.

For Type DPSG42 & DPSG43, 40 A Starter. Select any of the Thermal Units from above.

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