Square D Digest 179

Thermal Units

Thermal Unit Selection Thermal Unit Selection Tables

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Thermal Unit Selection Tables

Thermal Unit Table 2 (index and instructions: page 16-134 to page 16-138) Motor FLC (A)

Thermal Unit Table 1 (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.

0.35–0.38 0.39–0.43 0.44–0.48 0.49–0.56 0.57–0.63 0.64–0.71 0.72–0.78 0.79–0.88 0.89–0.99 1.00–1.15 1.16–1.23 1.24–1.43 1.44–1.51 1.52–1.75 1.76–1.93 1.94–2.25 2.26–2.47 2.48–2.81 2.82–3.20 3.21–3.63 3.64–4.19 4.20–4.53 4.54–4.89 4.90–5.68 5.69–6.27 6.28–6.85 6.86–7.73 7.74–8.50 8.51–9.29 9.30–10.4 10.5–11.3 11.4–12.3 12.4–13.9 14.0–15.0 15.1–18.0 — 15.1–17.4 17.5–19.2 19.3–22.0 22.1–24.6 24.7–26.0 — —

0.30–0.32 0.33–0.37 0.38–0.39 0.40–0.48 0.49–0.57 0.58–0.64 0.65–0.70 0.71–0.78 0.79–0.87 0.88–0.98 0.99–1.13 1.14–1.25 1.26–1.40 1.41–1.58 1.59–1.79 1.80–1.91 1.92–2.20 2.21–2.55 2.56–2.87 2.88–3.24 3.25–3.48 3.49–3.85 3.86–4.10 4.11–4.79 4.80–5.31 5.32–5.65 5.66–6.35 6.36–7.31 7.32–8.34 8.35–8.84 8.85–9.47 9.48–10.4 10.5–11.5 11.6–12.0 — 11.6–12.4 12.5–14.0 14.1–15.8 15.9–17.8 17.9–19.7 19.8–22.4 22.5–25.1 25.1–26.0

B 0.44 B 0.51 B 0.57 B 0.63 B 0.71 B 0.81 B 0.92 B 1.03 B 1.16 B 1.30 B 1.45 B 1.67 B 1.88 B 2.10 B 2.40 B 2.65 B 3.00 B 3.30 B 3.70 B 4.15 B 4.85 B 5.50 B 6.25 B 6.90 B 7.70 B 8.20 B 9.10 B 10.2 B 11.5 B 12.8 B 14.0 B 15.5 B 17.5 B 19.5 B 22.0 B 19.5 B 22.0 B 25.0 B 28.0 B 32.0 B 36.0 B 40.0 B 45.0

0.33–0.36 0.37–0.40 0.41–0.45 0.46–0.52 0.53–0.59 0.60–0.66 0.67–0.73 0.74–0.81 0.82–0.91 0.92–1.02 1.03–1.14 1.15–1.29 1.20–1.42 1.43–1.64 1.65–1.80 1.81–2.10 2.11–2.30 2.31–2.61 2.62–2.99 3.00–3.37 3.38–3.94 3.95–4.24 4.25–4.54 4.55–5.29 5.30–5.73 5.74–6.35 6.36–7.08 7.09–7.83 7.84–8.47 8.48–9.83 9.84–10.5 10.6–11.4 11.5–12.8 12.9–13.9 14.0–16.1 16.2–18.0

0.29–0.32 0.33–0.36 0.37–0.39 0.40–0.47 0.48–0.56 0.57–0.63 0.64–0.69 0.70–0.77 0.78–0.86 0.87–0.96 0.97–1.11 1.12–1.23 1.24–1.37 1.38–1.55 1.56–1.75 1.76–1.92 1.93–2.16 2.17–2.50 2.51–2.81 2.82–3.16 3.17–3.40 3.41–3.76 3.77–4.00 4.01–4.68 4.69–5.18 5.19–5.51 5.52–6.19 6.20–7.12 7.13–8.15 8.16–8.60 8.61–9.21 9.22–10.1 10.2–11.2 11.3–12.0

B 0.44 B 0.51 B 0.57 B 0.63 B 0.71 B 0.81 B 0.92 B 1.03 B 1.16 B 1.30 B 1.45 B 1.67 B 1.88 B 2.10 B 2.40 B 2.65 B 3.00 B 3.30 B 3.70 B 4.15 B 4.85 B 5.50 B 6.25 B 6.90 B 7.70 B 8.20 B 9.10 B 10.2 B 11.5 B 12.8 B 14.0 B 15.5 B 17.5 B 19.5 B 22.0 B 25.0 B 19.5 B 22.0 B 25.0 B 28.0 B 32.0 B 36.0 B 40.0 B 45.0

16 NEMA AND DEFINITE PURPOSE CONTACTORS AND STARTERS

— —

Following Selections for Size M-1 & M-1P Only.

Following Selections for Size M-1 & M-1P Only.

11.3–12.1 12.2–13.6 13.7–15.3 15.4–17.3 17.4–19.1 19.2–21.7 21.8–24.2 24.3–26.0

— —

16.2–17.6 17.7–20.6 20.7–23.1 23.2–26.0

— —

Following Selections for Size M-1P Only.

Following Selections for Size M-1P Only

B 36.0 B 40.0 B 45.0

24.7–29.1 29.2–31.7 31.8–36.0

— — —

23.2–27.1 27.2–29.2 29.3–33.0 33.1–36.0

B 36.0 B 40.0 B 45.0 B 50.0

— — — —

16-139

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